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authorGlenn Morris2014-10-01 21:24:07 -0700
committerGlenn Morris2014-10-01 21:24:07 -0700
commit5f8947c7007d1d844b3d1de97e2d232a005ca07d (patch)
treecf5abb2f1ee842fd4a0a50fa9d611acc6325bb4c
parent31300bee24ddcfd7dc27e757513d3c176a7fad83 (diff)
downloademacs-5f8947c7007d1d844b3d1de97e2d232a005ca07d.tar.gz
emacs-5f8947c7007d1d844b3d1de97e2d232a005ca07d.zip
Rotate etc/NEWS files for version 25
-rw-r--r--etc/NEWS3789
-rw-r--r--etc/NEWS.243822
2 files changed, 3826 insertions, 3785 deletions
diff --git a/etc/NEWS b/etc/NEWS
index f5720280db4..1c45cc0c6c3 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -1,14 +1,14 @@
1GNU Emacs NEWS -- history of user-visible changes. 1GNU Emacs NEWS -- history of user-visible changes.
2 2
3Copyright (C) 2010-2014 Free Software Foundation, Inc. 3Copyright (C) 2014 Free Software Foundation, Inc.
4See the end of the file for license conditions. 4See the end of the file for license conditions.
5 5
6Please send Emacs bug reports to bug-gnu-emacs@gnu.org. 6Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7If possible, use M-x report-emacs-bug. 7If possible, use M-x report-emacs-bug.
8 8
9This file is about changes in Emacs version 24. 9This file is about changes in Emacs version 25.
10 10
11See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, 11See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12and NEWS.1-17 for changes in older Emacs versions. 12and NEWS.1-17 for changes in older Emacs versions.
13 13
14You can narrow news to a specific version by calling `view-emacs-news' 14You can narrow news to a specific version by calling `view-emacs-news'
@@ -322,6 +322,7 @@ fullwidth frames, the behavior may depend on the toolkit used.
322 setting default font, menu bar, fringe width, or scroll bars of a 322 setting default font, menu bar, fringe width, or scroll bars of a
323 specific frame does not resize that frame in order to preserve the 323 specific frame does not resize that frame in order to preserve the
324 number of columns or lines it displays. 324 number of columns or lines it displays.
325
325 326
326* Changes in Emacs 25.1 on Non-Free Operating Systems 327* Changes in Emacs 25.1 on Non-Free Operating Systems
327 328
@@ -330,3788 +331,6 @@ fullwidth frames, the behavior may depend on the toolkit used.
330or Windows Server 2003. The built binaries still run on all versions 331or Windows Server 2003. The built binaries still run on all versions
331of Windows starting with Windows 9X. 332of Windows starting with Windows 9X.
332 333
333
334* Installation Changes in Emacs 24.4
335
336** Emacs can now be compiled with ACL (access control list) support.
337This happens by default if a suitable support library is found at
338build time, like libacl on GNU/Linux. To prevent this, use the
339configure option `--disable-acl'. See below for the features this provides.
340
341** Emacs can now be compiled with file notification support.
342This happens by default if a suitable system library is found at
343build time. To prevent this, use the configure option
344`--without-file-notification'. See below for file-notify features.
345This feature is not available for the Nextstep port.
346
347** Emacs can now be compiled with zlib support.
348This happens by default if zlib is present, which it normally is.
349To prevent this, use the configure option `--without-zlib'.
350This provides the function `zlib-decompress-region'; see below for details.
351
352** The configure option `--without-compress-info' has been generalized,
353and renamed to `--without-compress-install'. It now prevents compression
354of _any_ files during installation.
355
356** The configure option `--with-crt-dir' has been removed.
357It is no longer needed, as the crt*.o files are no longer linked specially.
358
359** Directories passed to configure option `--enable-locallisppath' are
360no longer created during installation.
361
362** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
363This requires pkg-config to be available at build time.
364
365
366* Startup Changes in Emacs 24.4
367
368** When initializing `load-path', an empty element in the EMACSLOADPATH
369environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
370"/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
371load-path (the one that would have been used if EMACSLOADPATH was unset).
372This makes it easier to _extend_ the load-path via EMACSLOADPATH
373(previously, EMACSLOADPATH had to specify the complete load-path,
374including the defaults). (In older versions of Emacs, an empty element
375was replaced by ".", so use an explicit "." now if that is what you want.)
376
377** The -L option, which normally prepends its argument to load-path,
378will instead append, if the argument begins with `:' (or `;' on MS Windows;
379i.e., `path-separator').
380
381** If you use either site-load.el or site-init.el to customize the dumped
382Emacs executable, any changes to `load-path' that these files make
383will no longer be present after dumping. To affect a permanent change
384to `load-path', use the `--enable-locallisppath' option of `configure'.
385
386** The user option `initial-buffer-choice' can now specify a function
387to set up the initial buffer.
388
389
390* Changes in Emacs 24.4
391
392** Support for ACLs (access control lists).
393This requires a suitable support library to be found at build time.
394On GNU/Linux, the POSIX ACL interface is used via libacl.
395On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
396ACLs are extended file attributes, used e.g. for finer-grained permissions.
397
398*** Emacs preserves the ACL entries of files when backing up.
399
400*** New functions `file-acl' and `set-file-acl' get and set file ACLs.
401
402** Support for menus on text-mode terminals.
403If the terminal supports a mouse, clicking on the menu bar, or on
404sensitive portions of the mode line or header line, will drop down the
405menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
406C-mouse-3 on the text area will pop up the menus defined for those locations.
407
408If the text terminal does not support a mouse, you can activate the
409first menu-bar menu by typing F10, which invokes `menu-bar-open'.
410
411If you want the previous behavior, where F10 invoked `tmm-menubar',
412customize the option `tty-menu-open-use-tmm' to a non-nil value.
413(Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
414is nil.)
415
416** New option `load-prefer-newer' affects how the `load' function chooses
417the file to load. If this is non-nil, then when both .el and .elc
418versions of a file exist, and the caller did not explicitly specify
419which one to load, then the newer file is loaded. The default, nil,
420means to always load the .elc file.
421
422** Multi-monitor support
423
424*** New functions `display-monitor-attributes-list' and
425`frame-monitor-attributes' can be used to obtain information about
426each physical monitor on multi-monitor setups.
427
428*** The functions `display-pixel-width' and `display-pixel-height' now
429behave consistently among the platforms: they return the pixel width
430or height for all physical monitors associated with the given display
431as if they were on X. To get information for each physical
432monitor, use the new functions above. Similar notes also apply to
433`x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
434`display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
435
436** New function `zlib-decompress-region', which decompresses gzip- and
437zlib-format compressed data using built-in zlib support (if available).
438
439** The *Messages* buffer is created in `messages-buffer-mode',
440a new major mode, with read-only status. Any code that might create
441the *Messages* buffer should call the function `messages-buffer' to do
442so and set up the mode.
443
444** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
445You can change the default by customizing `blink-cursor-blinks'.
446
447** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
448This affects View mode, etc.
449
450** The default value of `make-backup-file-name-function' is no longer nil.
451Instead it defaults to a function that does what the nil value used to.
452
453** Help
454
455*** The command `apropos-variable' is renamed to `apropos-user-option'.
456`apropos-user-option' shows all user options, while `apropos-variable'
457shows all variables. When called with a universal prefix argument,
458the two commands swap their behaviors. When `apropos-do-all' is
459non-nil, they output the same results.
460
461*** The key `?' now describes prefix bindings, like `C-h'.
462
463*** The command `describe-function' has been extended for EIEIO.
464Running it on constructors will show a full description of the
465generated class. For generic functions, it will show all
466implementations together with links to the source. The old commands
467`describe-class', `describe-constructor' and `describe-generic' were
468removed.
469
470*** The function `quail-help' is no longer an interactive command.
471Use `C-h C-\' (`describe-input-method') instead.
472
473** Frame and window handling
474
475*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
476bound to <f11> and M-<f10>, respectively.
477
478*** New hooks `focus-in-hook', `focus-out-hook'.
479These are normal hooks run when an Emacs frame gains or loses input focus.
480
481*** The function `window-in-direction' now takes additional arguments
482for specifying a reference point, wrapping the selection around frame
483borders, and specifying ways to select the minibuffer window.
484
485*** Emacs can now change frame sizes in units of pixels, rather than
486text rows or columns. When maximizing a frame or making it fullscreen,
487remaining extra pixels are no longer given to the minibuffer, the rightmost
488fringe, or other unusable space, but are distributed among the text
489areas of the frame's windows. If the new option `frame-resize-pixelwise'
490is non-nil, all frame size changes happen pixelwise and set the
491corresponding size hints for the window manager.
492
493*** Emacs can now change window sizes in units of pixels.
494Mouse-dragging a mode line or window divider now changes the size of
495adjacent windows pixelwise. If the new option `window-resize-pixelwise'
496is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
497resize windows pixelwise. Most functions for changing or accessing
498window sizes now have an additional argument that allows changes to apply,
499or values to be returned, in pixels instead of lines/columns.
500
501*** The functions `window-body-height' and `window-body-width' now never
502count partially visible lines or columns if called with a nil PIXELWISE
503argument.
504
505*** Emacs can now draw dividers between adjacent windows. To put
506dividers between side-by-side/vertically stacked windows customize the
507frame parameters `right-divider-width' and `bottom-divider-width' to
508some positive integer. You can drag dividers with the mouse (they show
509a corresponding cursor when the mouse hovers over them). You can change
510the appearance of dividers by customizing the faces `window-divider',
511`window-divider-first-pixel', and `window-divider-last-pixel'. The last
512two are useful to provide a 3D effect, or to better distinguish dividers
513from surrounding display objects.
514
515*** New functions to return the pixel sizes of window components, namely
516`window-scroll-bar-width', `window-mode-line-height',
517`window-header-line-height', `window-right-divider-width', and
518`window-bottom-divider-width'.
519
520*** The new function `window-text-pixel-size' returns the size of the
521text of a window's buffer in pixels. This allows functions like
522`fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
523window to its buffer as it will be displayed.
524
525*** `fit-window-to-buffer' can now resize windows in both dimensions.
526This behavior is controlled by the new option
527`fit-window-to-buffer-horizontally'. The new option
528`fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
529
530*** `fit-frame-to-buffer' now fits frames in both dimensions. The new
531options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
532control the size of the frame and its position on screen.
533
534*** Temp Buffer Resize Mode can now adjust the height and width of
535windows and frames. The new option `temp-buffer-max-width' allows you to
536control the width of temporary buffer windows. Moreover, if the new
537option `fit-frame-to-buffer' is non-nil and the buffer appears in the
538root window of a frame, Temp Buffer Resize Mode will try to adjust the
539width and/or height of the frame.
540
541*** `split-window' is now a non-interactive function, not a command.
542As a command, it was a special case of `C-x 2' (`split-window-below'),
543and as such superfluous. After being reimplemented in Lisp, its
544interactive form was mistakenly retained.
545
546*** The functions `window-size' and `window-total-size' now have an
547optional argument to return a rounded size value.
548
549*** `window-state-put' now allows you to put a window state into internal
550windows too.
551
552*** New option `scroll-bar-adjust-thumb-portion'.
553Available only on X, this option allows you to control over-scrolling
554using the scroll bar (i.e., dragging the thumb down even when the end
555of the buffer is visible).
556
557*** New display actions functions for `display-buffer':
558
559**** `display-buffer-at-bottom' chooses or creates a window at the
560bottom of the selected frame.
561
562**** `display-buffer-no-window' to not display the buffer in a window.
563
564*** New display action alist entry `allow-no-window' to indicate the
565caller of `display-buffer' is ready to handle the case of not displaying
566the buffer in a window.
567
568*** `display-buffer-in-previous-window' is now a member of
569`display-buffer-fallback-action'.
570
571** Lisp evaluation
572
573*** `eval-defun' on an already defined defcustom calls the :set function,
574if there is one.
575
576*** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
577and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
578zero prefix argument. This disables truncation of lists in the output,
579equivalent to setting `(eval-expression-)print-length' and
580`(eval-expression-)print-level' to nil. Additionally, it causes integers
581to be printed in other formats (octal, hexadecimal, and character).
582
583*** New hook `eval-expression-minibuffer-setup-hook' run by
584`eval-expression' on entering the minibuffer.
585
586** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
587because it affects caching of paragraph scanning results as well.
588There is no reason to set this to nil except for debugging purposes.
589
590** `emacs-bzr-version' has been renamed to `emacs-repository-version',
591and works for git too, if you fetch the repository notes.
592
593** The default value of `comment-use-global-state' is now t,
594and this variable has been marked obsolete.
595
596** `write-region-inhibit-fsync' now defaults to t in batch mode.
597
598** The option `set-mark-default-inactive' has been deleted.
599This unfinished feature was introduced by accident in Emacs 23.1;
600simply disabling Transient Mark mode does the same thing.
601
602
603* Editing Changes in Emacs 24.4
604
605** Indentation
606
607*** `electric-indent-mode' is now enabled by default.
608Typing RET reindents the current line and indents the new line.
609`C-j' inserts a newline but does not indent. In some programming modes,
610additional characters are electric (eg `{').
611
612*** New buffer-local `electric-indent-local-mode'.
613
614*** The behavior of `C-x TAB' (`indent-rigidly') has changed.
615When invoked without a prefix argument, it now activates a transient
616mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
617the text indentation in the region. Typing any other key resumes
618normal editing behavior.
619
620*** `tab-stop-list' is now implicitly extended to infinity by repeating
621the last step. Its default value is changed to nil, which means a tab
622stop every `tab-width' columns.
623
624** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
625In other words, if you visit two files that have the same base name,
626then rather than creating buffers basename and basename<2>,
627Emacs uses basename<dirA> and basename<dirB>. To change this,
628customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
629
630** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
631Most commands are still unaware of it, but kill/yank do work on the rectangle.
632
633** New option `visual-order-cursor-movement'.
634If this is non-nil, cursor motion with arrow keys will follow the
635visual order of characters on the screen: <left> always moves to the
636left, <right> always moves to the right, disregarding the surrounding
637bidirectional context.
638
639** New command `delete-duplicate-lines'.
640This searches the region for identical lines, and removes all but one
641copy of each repeated line. The lines need not be sorted.
642
643** New command `cycle-spacing' acts like a smarter `just-one-space'.
644When called in succession, it cycles between spacing conventions:
645one space, no spaces, original spacing.
646
647** `blink-matching-paren' now only highlights the matching open-paren
648by default, instead of moving the cursor. Set this variable to `jump' to
649restore the old behavior.
650
651** The new function `fill-single-char-nobreak-p' can stop fill from breaking
652a line after a one-letter word, which is an error in some typographical
653conventions. To use it, add it to the `fill-nobreak-predicate' hook.
654
655** Registers
656
657*** All interactive commands that read a register (`copy-to-register', etc.)
658now display a temporary window after `register-preview-delay' seconds
659that summarizes existing registers. To disable this, set that option to nil.
660Interactive commands that read registers and want to make use of this
661should use `register-read-with-preview' to read register names.
662
663*** New command `frameset-to-register' bound to `C-x r f', replacing
664`frame-configuration-to-register'. It offers similar functionality,
665plus enhancements like the ability to restore deleted frames.
666(`frame-configuration-to-register' still exists, but no longer has a
667key binding.)
668
669*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
670macros in registers.
671
672
673* Changes in Specialized Modes and Packages in Emacs 24.4
674
675** Backtrace and debugger
676
677*** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
678display of local variables of the current stack frame.
679
680*** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
681the lexical environment when evaluating the code in the context at point
682(and so allows you to access lexical variables).
683
684*** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
685
686** Battery information can now be retrieved from BSD's `apm' utility.
687
688** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
689
690** Calc
691
692*** Calc by default now uses the Gregorian calendar for all dates, and
693uses January 1, 1 AD as its day number 1. Previously Calc used the
694Julian calendar for dates before September 14, 1752, and it used
695December 31, 1 BC as its day number 1; the new scheme is more
696consistent with Calendar's calendrical system and day numbering.
697
698*** The new option `calc-gregorian-switch' lets you configure if
699(and when) Calc switches from the Julian to the Gregorian calendar.
700
701*** Support for ISO 8601 dates.
702
703** Calendar and Diary
704
705*** New faces `calendar-weekday-header', `calendar-weekend-header',
706and `calendar-month-header'.
707
708*** New option `calendar-day-header-array'.
709
710*** New variable `diary-from-outlook-function', used by the command
711`diary-from-outlook'.
712
713*** The variable `calendar-font-lock-keywords' is obsolete.
714
715** CEDET
716
717*** EDE
718
719**** The cpp-root project now supports executing a compile command.
720It can be set through the new :compile-command slot or the
721buffer-local variable `compile-command'.
722
723**** Better selection of include directories for the 'linux' project.
724Include directories now support out-of-tree build directories and
725target architecture auto-detection.
726
727*** Semantic
728
729**** Improved detection of used namespaces in current scope in C++.
730
731**** Parsing of default values for variables and function arguments in C/C++.
732They are also displayed by the summarize feature in the mode line.
733
734**** Improved parsing of function pointers in C/C++.
735This also includes parsing of function pointers as function arguments.
736
737**** Parsing of C/C++ preprocessor macros that open new scope.
738For example, this enables parsing of macros that open new namespaces.
739
740**** Support for 'this' pointer in inline member functions in C++.
741
742** CFEngine mode
743
744*** Support for completion, ElDoc, and Flycheck has been added.
745
746*** The current CFEngine syntax is parsed from "cf-promises -s json".
747There is a fallback syntax available if you don't have cf-promises or
748if your version doesn't support that option. See option `cfengine-cf-promises'.
749
750** cl-lib
751
752*** New macro `cl-tagbody'.
753This executes statements while allowing for control transfer to labels.
754
755*** letf is now just an alias for cl-letf.
756
757** CUA mode
758
759*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
760Hence, you can now enable it independently from those modes, and from
761`transient-mark-mode'.
762
763*** `cua-highlight-region-shift-only' is now obsolete.
764You can disable `transient-mark-mode' to get the same result.
765
766*** CUA's rectangles can now be used without CUA by calling the command
767`cua-rectangle-mark-mode'.
768
769** Delete Selection mode can now be used without Transient Mark mode.
770
771** Desktop
772
773*** `desktop-save-mode' by default now auto-saves an existing desktop file
774after `desktop-auto-save-timeout'. To disable this, customize that option
775to nil (or zero).
776
777*** Desktop now saves and restores the frame/window configuration.
778To disable this, set `desktop-restore-frames' to nil.
779See also related options `desktop-restore-reuses-frames',
780`desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
781
782** New Dired minor mode `dired-hide-details-mode' toggles whether details,
783such as file ownership or permissions, are visible in Dired buffers.
784See the new options `dired-hide-details-hide-symlink-targets' and
785`dired-hide-details-hide-information-lines' for customizing what to hide.
786
787** You can enable ElDoc inside the `eval-expression' minibuffer with:
788 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
789The results display in the mode line.
790
791** Electric Pair mode
792
793*** New option `electric-pair-preserve-balance', enabled by default.
794If non-nil, pairing/skipping only kicks in when that help the balance
795of parentheses and quotes; i.e., the buffer should end up at least as
796balanced as before.
797
798You can further control this behavior by adjusting the predicates
799stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
800
801*** New option `electric-pair-delete-adjacent-pairs', enabled by default.
802In `electric-pair-mode', the commands `backward-delete-char' and
803`backward-delete-char-untabify' are now bound to electric variants
804that delete the closer when invoked between adjacent pairs.
805
806*** New option `electric-pair-open-newline-between-pairs', enabled by default.
807In `electric-pair-mode', inserting a newline between adjacent pairs
808opens an extra newline after point, which is indented if
809`electric-indent-mode' is also set.
810
811*** New option `electric-pair-skip-whitespace', enabled by default.
812This controls if skipping over closing delimiters should jump over any
813whitespace slack. Setting it to `chomp' makes it delete this
814whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
815
816*** New variables control the pairing in strings and comments.
817You can customize `electric-pair-text-pairs' and
818`electric-pair-text-syntax-table' to tweak pairing behavior inside
819strings and comments.
820
821** New EPA option `epa-mail-aliases'.
822You can set this to a list of email address aliases that `epa-mail-encrypt'
823should use to find keys.
824
825** New ERC option `erc-accidental-paste-threshold-seconds'.
826If set to a number, this can be used to avoid accidentally pasting large
827amounts of data into the ERC input.
828
829** New ERT macro `skip-unless' allows skipping ERT tests.
830
831** Eshell
832
833*** `eshell' now supports visual subcommands and options.
834Eshell has been able to handle "visual" commands (interactive,
835non-line oriented commands such as top that require display
836capabilities not provided by eshell) by running them in an Emacs
837terminal emulator. See `eshell-visual-commands'.
838
839This feature has been extended to subcommands and options that make a
840usually line-oriented command a visual command. Typical examples are
841"git log" and "git <command> --help", which display their output in a
842pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
843
844*** New Eshell-Tramp module.
845External su and sudo commands are now the default; the internal,
846Tramp-using variants can still be used by enabling the eshell-tramp module.
847
848** New F90 mode option `f90-smart-end-names'.
849
850** New option `gnutls-verify-error', if non-nil, means that Emacs
851should reject SSL/TLS certificates that GnuTLS determines as invalid.
852(This option defaults to nil at present, but this is expected to change
853in a future release.)
854
855** Hi-Lock
856
857*** New global command `M-s h .' (`highlight-symbol-at-point') highlights
858the symbol near point.
859
860*** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
861will cycle through faces in `hi-lock-face-defaults' without prompting.
862
863** Icomplete is now more similar to Ido.
864
865*** Icomplete by default now applies to all forms of minibuffer completion.
866The variable `icomplete-with-completion-tables' (now a user option)
867controls this. To restore the old behavior, set it back to
868'(internal-complete-buffer).
869
870*** You can navigate through and select completions using the keys
871from `icomplete-minibuffer-map'.
872
873*** The string that separates potential completions is now a customizable
874option (`icomplete-separator'). The default is " | " rather than ",".
875
876*** New face `icomplete-first-match'; and new options
877`icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
878
879*** The option `icomplete-show-key-bindings' has been removed.
880
881** Ido
882
883*** An Ido user manual is now included.
884
885*** The option `ido-use-virtual-buffers' can now take the value `auto'.
886This means to use virtual buffers if the current ido input does not match
887an existing buffer.
888
889*** The variable `ido-decorations' can optionally have two new elements,
890which are the brackets to use around the sole remaining completion.
891
892** Image mode
893
894*** New commands `n' (`image-next-file') and `p' (`image-previous-file')
895visit the next image file and the previous image file in the same
896directory, respectively.
897
898*** New commands to show specific frames of multi-frame images.
899`f' (`image-next-frame') and `b' (`image-previous-frame') visit the
900next or previous frame. `F' (`image-goto-frame') shows a specific frame.
901
902*** New commands to speed up, slow down, or reverse animation.
903`a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
904speed up and slow down the animation. `a r' (`image-reverse-speed')
905to reverse it and `a 0' (`image-reset-speed') to reset it.
906
907*** The command `image-mode-fit-frame' deletes other windows.
908When toggling, it restores the frame's previous window configuration.
909It also has an optional frame argument, which can be used by Lisp
910callers to fit the image to a frame other than the selected frame.
911
912** New Imenu option `imenu-generic-skip-comments-and-strings'.
913
914** Info
915
916*** New Info face `info-index-match', used to highlight matches in index
917entries displayed by `Info-index-next', `Info-virtual-index' and
918`info-apropos'.
919
920*** The Info-edit command is obsolete. Editing Info nodes by hand
921has not been relevant for some time.
922
923** JS Mode
924
925*** New option `js-switch-indent-offset'.
926
927*** Better indentation of multiple-variable declarations.
928If a declaration spans several lines, variables on the following lines
929are lined up to the first one.
930
931*** Recognition and better indentation of continuations in array comprehensions.
932
933** MH-E has been updated to version 8.6 - see separate MH-E-NEWS file.
934
935** Octave mode
936
937*** Font locking for Texinfo comments and new keywords.
938
939*** Completion in Octave file buffers.
940
941*** ElDoc support.
942
943*** Jump to definition.
944
945*** Documentation lookup/search.
946
947** OPascal mode is the new name for Delphi mode
948
949*** All delphi-* variables and functions have been renamed to opascal-*.
950Obsolete aliases exist for those likely to have been used externally.
951
952*** The option `delphi-newline-always-indents' has been removed.
953Use `electric-indent-mode' instead.
954
955*** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
956
957** Package
958
959*** The package library now supports digital signing of packages.
960Maintainers of package archives should consider signing their packages
961to enhance security.
962
963**** If the user option `package-check-signature' is non-nil,
964Emacs tries to check package signatures at install time.
965The value `allow-unsigned' allows installation of unsigned packages.
966
967**** The user option `package-unsigned-archives' lists archives where
968Emacs will not try to check signatures.
969
970*** New option `package-pinned-packages'. This is useful if you have multiple
971archives enabled, with more than one offering a given package that you want.
972
973*** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
974to filter the list of packages by a keyword.
975
976*** In the `describe-package' buffer, there are now buttons listing the
977keywords related to the package. Click on a button to see other packages
978related to that keyword.
979
980*** The format of `archive-contents' files, generated by package
981repositories, has changed to allow a new (fifth) element in the data
982vectors, containing an associative list with extra properties.
983(For example, `describe-package' uses the `:url' extra property to
984display a "Homepage" header.)
985
986** In Prolog mode, `prolog-use-smie' has been removed,
987along with the non-SMIE indentation code.
988
989** Python mode
990
991*** Out of the box support for CPython, iPython and readline based shells.
992**** `python-shell-completion-module-string-code' is no longer used.
993
994*** Automatic shell prompt detection. New user options:
995**** `python-shell-interpreter-interactive-arg'.
996**** `python-shell-prompt-detect-enabled'.
997**** `python-shell-prompt-detect-failure-warning'.
998**** `python-shell-prompt-input-regexps'.
999**** `python-shell-prompt-output-regexps'.
1000
1001*** Python shell support for remote hosts via tramp.
1002
1003*** Correct display of line numbers for code sent to the Python shell.
1004
1005** Remember
1006
1007*** The new command `remember-notes' creates a buffer that is saved on exit.
1008You can use it as a more permanent *scratch* buffer.
1009
1010*** Remember can now store notes in separate files.
1011To use this, add `remember-store-in-files' to the `remember-handler-functions'
1012option. The files are saved in `remember-data-directory' using
1013names specified by `remember-directory-file-name-format'.
1014
1015** Rmail
1016
1017*** Customize `rmail-mbox-format' to influence some minor aspects of
1018how Rmail displays non-MIME messages.
1019
1020*** The `unrmail' command now converts from BABYL to mboxrd format,
1021rather than mboxo. Customize `unrmail-mbox-format' to change this.
1022
1023** Ruby mode
1024
1025*** Improved syntax highlighting and indentation.
1026
1027*** New `electric-indent-mode' integration.
1028
1029*** New option `ruby-encoding-magic-comment-style'.
1030
1031*** New option `ruby-custom-encoding-magic-comment-template'.
1032
1033*** New option `ruby-align-to-stmt-keywords'.
1034
1035*** New option `ruby-align-chained-calls'.
1036
1037*** More Ruby file types have been added to `auto-mode-alist'.
1038
1039** Search and Replace
1040
1041*** New global command `M-s .' (`isearch-forward-symbol-at-point')
1042starts a symbol (identifier) incremental search forward with the
1043symbol found near point added to the search string initially.
1044
1045*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
1046and adds it to the search string.
1047
1048*** `M-s i' in Isearch mode toggles whether search matches invisible text.
1049
1050*** `query-replace' skips invisible text when `search-invisible' is nil,
1051and opens overlays with hidden text when `search-invisible' is `open'.
1052
1053*** A negative prefix argument of replacement commands replaces backward.
1054`M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
1055backward, `M-s w words M-- M-%' replaces a sequence of words backward.
1056
1057*** By default, prefix arguments do not now terminate Isearch mode.
1058Set `isearch-allow-prefix' to nil to restore the old behavior.
1059
1060*** More Isearch commands accept prefix arguments, namely
1061`isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
1062`isearch-yank-line'.
1063
1064*** Word search now matches whitespace at the beginning/end
1065of the search string if it contains leading/trailing whitespace.
1066In an incremental word search or when using a non-nil LAX argument
1067of `word-search-regexp', the lax matching can also match part of
1068the first word (in addition to the lax matching of the last word).
1069The same rules are now applied to the symbol search, with the difference
1070that it matches symbols, and non-symbol characters between symbols.
1071
1072** New SES command `ses-rename-cell' allows assignment of names to SES cells.
1073
1074** The shell.el option `explicit-bash-args' includes --noediting by default.
1075All non-ancient Bash versions support this option.
1076
1077** Shell Script mode
1078
1079*** The SMIE indentation engine is now used by default - see `sh-use-smie'.
1080
1081*** `sh-mode' now has its own setting for `add-log-current-defun-function'.
1082
1083** SMIE
1084
1085*** You can customize the SMIE indentation of a mode via `smie-config'.
1086The command `smie-config-guess' can help you derive the appropriate
1087indentation settings, if you provide it with an indented sample file.
1088Use `smie-config-save' to save the result.
1089
1090*** You can customize the SMIE indentation of a file by adding an entry to
1091the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
1092
1093*** New commands `smie-config-show-indent' and `smie-config-set-indent'.
1094
1095** SQL mode
1096
1097*** Improved login monitoring and appropriate response to login failures.
1098New variable `sql-login-delay' defines maximum wait time for a connection.
1099
1100*** Oracle support.
1101SQL*Plus script placeholders are properly highlighted and identified
1102in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
1103are passed before the logon parameter, as required. The default now
1104includes `-L', to limit the number of logon attempts per invocation.
1105
1106** New Term mode option `term-suppress-hard-newline'.
1107
1108** Todo mode has been rewritten and enhanced.
1109The Todo mode user manual describes all commands and most user
1110options. To support some of these features, a new file format is
1111used, which is incompatible with the old format; however, you can
1112convert old todo and done item files to the new format on initializing
1113the first new todo file, or at any later time with the provided
1114conversion command. The previous version of todo-mode.el has been
1115renamed to otodo-mode.el and is now obsolete. New features include:
1116
1117*** Support for multiple todo files and archive files of done items.
1118
1119*** Renaming, reordering, moving, merging, and deleting categories.
1120
1121*** Sortable tabular summaries of categories and the item types they contain.
1122
1123*** Cross-category lists of items filtered by specific criteria.
1124
1125*** More fine-grained interaction with the Emacs diary, by being able to
1126decide for each todo item whether it appears in the Fancy Diary display.
1127
1128*** Highly flexible new item insertion and item editing.
1129
1130*** Moving items between categories, storing done items in their category
1131or in archive files, undoing or unarchiving done items.
1132
1133*** Reprioritizing items by inputting a numerical priority.
1134
1135*** Extensive customizability of operation and display, including many faces.
1136
1137** Trace
1138
1139*** `trace-function' and `trace-function-background' no longer prompt for
1140the output buffer. Unless you use a prefix argument, they output to
1141`trace-buffer'.
1142
1143*** With a prefix argument, `trace-function' and `trace-function-background'
1144will prompt for a "context". This is a Lisp expression, whose value at the
1145time the function is entered/exited is printed along with the function's
1146name and arguments.
1147
1148** Tramp
1149
1150*** New connection method "adb", which allows to access Android
1151devices by the Android Debug Bridge. The variable `tramp-adb-program'
1152can be used to adapt the path of the "adb" program, if needed.
1153
1154*** Handlers for `file-acl' and `set-file-acl' for remote machines
1155that support POSIX ACLs.
1156
1157*** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
1158for remote machines that support filesystem notifications.
1159
1160*** The experimental url syntax for remote file names has been removed.
1161
1162*** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
1163"scpc" and "rsyncc" are discontinued. The ssh option
1164"ControlMaster=auto" is set automatically in all ssh-based methods,
1165when possible. See `tramp-use-ssh-controlmaster-options'.
1166
1167** New URL command `url-cookie-list' displays the current cookies,
1168and allows you to interactively remove cookies.
1169
1170** VC and related modes
1171
1172*** In VC directory mode, `D' displays diffs between VC-controlled
1173whole tree revisions.
1174
1175*** In VC directory mode, `L' lists the change log for the current VC
1176controlled tree in a window.
1177
1178*** In VC directory mode, `I' shows a log of changes that will be
1179received with a pull operation.
1180
1181*** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
1182under current version control system. When called with a prefix
1183argument, you can remove a file from the ignored file list.
1184
1185** VHDL mode
1186
1187*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
1188
1189*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
1190
1191** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
1192are obsolete. Customize the `woman-*' faces instead.
1193
1194** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
1195Affected files:
1196~/.emacs.d/timelog replaces ~/.timelog
1197~/.emacs.d/vip replaces ~/.vip
1198~/.emacs.d/viper replaces ~/.viper
1199~/.emacs.d/ido.last replaces ~/.ido.last
1200~/.emacs.d/kkcrc replaces ~/.kkcrc
1201~/.emacs.d/quickurls replaces ~/.quickurls
1202~/.emacs.d/idlwave/ replaces ~/.idlwave/
1203~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
1204~/.emacs.d/places replaces ~/.emacs-places
1205~/.emacs.d/shadows replaces ~/.shadows
1206~/.emacs.d/shadow_todo replaces ~/.shadow_todo
1207~/.emacs.d/strokes replaces ~/.strokes
1208~/.emacs.d/notes replaces ~/.notes
1209~/.emacs.d/type-break replaces ~/.type-break
1210Also the following files used by the now obsolete otodo-mode.el:
1211~/.emacs.d/todo-do replaces ~/.todo-do
1212~/.emacs.d/todo-done replaces ~/.todo-done
1213~/.emacs.d/todo-top replaces ~/.todo-top
1214
1215** Obsolete packages
1216
1217*** iswitchb.el; use icomplete-mode.
1218
1219*** longlines.el; use visual-line-mode.
1220
1221*** meese.el.
1222
1223*** sup-mouse.el.
1224
1225*** terminal.el; use term.el instead.
1226
1227*** the old version of todo-mode.el (renamed to otodo-mode.el).
1228
1229*** xesam.el (owing to the cancellation of the XESAM project).
1230
1231*** yow.el; use fortune.el or cookie1.el instead.
1232
1233
1234* New Modes and Packages in Emacs 24.4
1235
1236** New package eww.el provides a built-in web browser.
1237This requires Emacs to have been compiled with libxml2 support.
1238
1239** New package nadvice.el offers lighter-weight advice facilities.
1240It is layered as:
1241
1242*** `add-function'/`remove-function', which can be used to add/remove code on
1243any function-carrying place, such as process filters or `<foo>-function' hooks.
1244
1245*** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
1246function, much like `defadvice' does.
1247
1248** New package frameset.el provides a set of operations to save a frameset
1249(the state of all or a subset of the existing frames and windows, somewhat
1250similar to a frame configuration), both in-session and persistently, and
1251restore it at some point in the future.
1252
1253** New package filenotify.el provides an interface for file system
1254notifications. It requires that Emacs be compiled with one of the
1255low-level libraries gfilenotify.c, inotify.c or w32notify.c.
1256
1257** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
1258display specified symbols as composed characters. E.g., in Emacs Lisp mode,
1259this replaces the string "lambda" with the Greek lambda character.
1260
1261** New minor mode `superword-mode', which overrides the default word motion
1262commands to treat "symbol_words" as a single word, similar to what
1263`subword-mode' does.
1264
1265
1266* Incompatible Lisp Changes in Emacs 24.4
1267
1268** The default file coding for Emacs Lisp files is now utf-8.
1269(See `file-coding-system-alist'.) In most cases, this change is
1270transparent, but files that contain unusual characters without
1271specifying an explicit coding system may fail to load with obscure
1272errors. You should either convert them to utf-8 or add an explicit
1273`coding:' cookie.
1274
1275** Default process filters and sentinels are not nil any more.
1276Instead they default to a function that does what the nil value used to do.
1277
1278** Overlay priority does not have to be nil or a non-negative integer.
1279Overlay priority can be other kinds of Lisp objects. We didn't yet
1280decide whether other types of values are stable enough, and therefore
1281don't feel it's right to document them. For now, don't assume in your
1282code that the values of overlay priority can only be either nil or an
1283integer, always test them with an appropriate predicate to be one or
1284the other. If you need to sort arbitrary overlays into priority
1285order, `overlays-at' can now optionally do this.
1286You should still only specify integer priorities on overlays you create.
1287
1288** The cars of the elements in `interpreter-mode-alist' are now
1289treated as regexps rather than literal strings.
1290
1291** `overriding-terminal-local-map' no longer replaces the local keymaps.
1292It used to disable the minor mode, major mode, and text-property keymaps,
1293whereas now it simply has higher precedence.
1294
1295** `kill-region' has lost its `yank-handler' optional argument.
1296
1297** `(input-pending-p)' no longer runs other timers that are ready to run.
1298The new optional CHECK-TIMERS parameter allows for the prior behavior.
1299
1300** `defvar' and `defcustom' in a let-binding affect the "external" default.
1301
1302** The syntax of ?» and ?« is now punctuation instead of matched parens.
1303Some languages match those as »...«, and others as «...», so it is
1304better for Emacs to stay neutral by default.
1305
1306** `read-event' does not always decode chars in ttys any more. As was the case
1307in Emacs 22 and before, `read-event' (and `read-char') by default read raw
1308bytes from the terminal. If you want to read decoded chars instead (as was
1309always the case in Emacs-23, for example), pass a non-nil
1310`inherit-input-method' argument.
1311
1312** In `symbol-function', nil and "unbound" are indistinguishable.
1313`symbol-function' does not signal a `void-function' error any more.
1314To determine if a symbol's function definition is void, use `fboundp'.
1315
1316** `defadvice' does not honor the `freeze' flag and cannot advise
1317special-forms any more.
1318
1319** `dolist' no longer binds VAR while evaluating the RESULT form,
1320when lexical binding is enabled. Previously, VAR was bound to nil,
1321which often led to spurious unused-variable warnings.
1322
1323** The return value of `backup-buffer' has changed.
1324The second argument is no longer an SELinux context, instead it is an
1325alist of extended attributes as returned by the new function
1326`file-extended-attributes'. The attributes can be applied to another
1327file using `set-file-extended-attributes'.
1328
1329** By default `copy-file' no longer copies file permission bits to an
1330existing destination; and it sets the file permission bits of a newly
1331created destination to those of the source, masked by the default file
1332permissions. To copy the file permission bits, pass t as the
1333PRESERVE-PERMISSIONS argument of `copy-file'.
1334
1335** `visited-file-modtime' now returns -1 for nonexistent files.
1336Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1337in the presence of files with negative time stamps.
1338
1339** Frame-local variables that affect redisplay do not work any more.
1340More specifically, redisplay does not bother to check for a frame-local
1341value when looking up variables.
1342
1343** In compiled Lisp files, the header no longer includes a timestamp.
1344
1345** The option `inhibit-local-menu-bar-menus' has been removed.
1346
1347
1348* Lisp Changes in Emacs 24.4
1349
1350** Change to the Emacs Lisp coding conventions: the package descriptor
1351and name of global variables, constants, and functions should be separated
1352by two hyphens if the symbol is not meant to be used by other packages.
1353
1354** The second argument of `eval' can now specify a lexical environment.
1355
1356** New macro `define-alternatives' can be used to define generic commands.
1357Generic commands are interactive functions whose implementation can be
1358selected among several alternatives, as a matter of user preference.
1359
1360** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1361
1362** New functions `special-form-p' and `macrop'.
1363
1364** New macro `with-eval-after-load'.
1365This is like the old `eval-after-load', but better behaved.
1366
1367** If you give a symbol a `defalias-fset-function' property, `defalias'
1368on that symbol will use the associated value as a function to call
1369in place of `fset'.
1370
1371** New variable `enable-dir-local-variables'.
1372Directory-local variables are ignored if this is nil. This may be
1373useful for modes that want to ignore directory-locals while still
1374respecting file-local variables.
1375
1376** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1377as a function to call to provide default values.
1378
1379** New functions `group-gid' and `group-real-gid'.
1380
1381** New function `get-pos-property'.
1382
1383** New hook `pre-redisplay-function'.
1384
1385** `byte-compile-interactive-only-functions' is now obsolete.
1386To specify that a command should only be called interactively, give it
1387a non-nil `interactive-only' property.
1388
1389** New function `string-suffix-p'.
1390
1391** `split-string' now takes an optional argument TRIM.
1392The value, if non-nil, is a regexp that specifies what to trim from
1393the start and end of each substring.
1394
1395** Completion
1396
1397*** The separator used by `completing-read-multiple' is now a regexp.
1398The default `crm-separator' has been changed to allow surrounding spaces
1399around the comma.
1400
1401*** New function `completion-table-with-cache' is a wrapper for
1402`completion-table-dynamic' that caches the result of the last lookup.
1403
1404*** New function `completion-table-merge' to combine several
1405completion tables by merging their completions.
1406
1407*** The `common-substring' argument of `display-completion-list',
1408which has been documented as obsolete since Emacs 23.1, is now _really_
1409obsolete, and no longer advertised. Instead either call
1410`completion-hilit-commonality' to add the highlighting; or use
1411`completion-all-completions', which returns highlighted strings.
1412
1413** Encoding and decoding of text
1414
1415*** New coding-system `prefer-utf-8'.
1416This is like `undecided' but prefers UTF-8 on decoding if the text to
1417be decoded does not contain any invalid UTF-8 sequences. On encoding,
1418any non-ASCII characters are automatically encoded as UTF-8.
1419
1420*** New attributes of coding-systems whose type is `undecided'.
1421Two new attributes, `:inhibit-null-byte-detection' and
1422`:inhibit-iso-escape-detection', determine how to detect encoding of
1423text that includes null bytes and ISO-2022 escape sequences, respectively.
1424Each of these attributes can be either nil, zero, or t. If t, decoding
1425text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1426null bytes cause text to be decoded with no-conversion, and ISO-2022
1427sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1428encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1429`inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1430The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1431UTF-8 encoding and decoding, whenever possible.
1432
1433These attributes are only meaningful for coding-systems of type `undecided'.
1434(The type of a coding-system is determined by its `:coding-type' attribute
1435and can be accessed by calling the `coding-system-type' function.)
1436
1437** Error-handling
1438
1439*** New function `define-error'.
1440
1441*** `with-demoted-errors' takes an additional argument `format'.
1442
1443*** Errors from timer functions are no longer silently discarded,
1444but are reported as messages. So you may see "Error running timer"
1445messages from code that was failing silently till now. Set
1446`debug-on-error' non-nil to get a real error and a backtrace.
1447
1448** Faces
1449
1450*** Face specs set via Custom themes now replace the `defface' spec
1451rather than inheriting from it. In other words, setting a face via a
1452theme now behaves like setting it via Customize: you only need to
1453specify the attributes that you want, you don't need to unset those
1454that you don't want.
1455
1456*** The function `face-spec-set' is now like `setq' for face specs.
1457Its third arg now accepts values specifying a face spec type (defface,
1458custom, or override spec), and the relevant spec is set accordingly.
1459
1460*** New face spec attribute :distant-foreground
1461specifies foreground to use if background color is near the foreground
1462color that would otherwise have been used.
1463
1464*** New function `add-face-text-property', which can be used to
1465conveniently prepend/append new face properties.
1466
1467*** New face characteristic (supports :underline (:style wave))
1468specifies whether or not the terminal can display a wavy line.
1469
1470** File-handling
1471
1472*** Support for filesystem notifications.
1473Emacs now supports notifications of filesystem changes, such as
1474creation, modification, and deletion of files. This requires the
1475`glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1476MS-Windows systems, this is supported for Windows XP and newer.
1477
1478*** The 9th element returned by `file-attributes' is now unspecified.
1479Formerly, it was t if the file's gid would change if file were deleted
1480and recreated. This value has been inaccurate for years on many
1481platforms, and nobody seems to have noticed or cared.
1482
1483*** The 6th argument to `copy-file' has been renamed to
1484PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1485Unix file permission bits as well as SELinux context.
1486
1487*** The function `file-ownership-preserved-p' now has an optional
1488argument GROUP which causes it check for file group too. This can be
1489used in place of the 9th element of `file-attributes'.
1490
1491*** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1492with the same interpretation as the returned value of `visited-file-modtime'.
1493
1494** Image API
1495
1496*** `image-animated-p' is now `image-multi-frame-p'.
1497It returns non-nil for any image that contains multiple frames,
1498whether or not it specifies a frame delay.
1499
1500*** New variable `image-default-frame-delay' gives the frame delay for
1501animated images which do not specify a frame delay.
1502
1503*** New functions `image-current-frame' and `image-show-frame' for getting
1504and setting the current frame of a multi-frame image.
1505
1506** ImageMagick
1507
1508*** ImageMagick images now support the :max-width and :max-height keywords.
1509
1510*** When using `create-image' with image data, you can pass a :format
1511attribute (via the property-list argument) in order to help
1512ImageMagick detect the image type. The value should be a MIME
1513content-type that is found in the new variable `image-format-suffixes'.
1514
1515** Revert and Autorevert
1516
1517*** If Emacs is compiled with file notification support, it uses notifications
1518instead of checking file time stamps. To disable this, set the user option
1519`auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1520expression matching directories to be excluded from file notifications via
1521`auto-revert-notify-exclude-dir-regexp'.
1522
1523*** The default values of `buffer-stale-function', `revert-buffer-function',
1524and `revert-buffer-insert-file-contents-function' are no longer nil.
1525Instead they default to functions that do what the nil value used to.
1526
1527*** `buffer-stale-function' is now used for buffers visiting files too.
1528
1529*** The new user option `auto-revert-remote-files' enables reversion
1530of remote files, if non-nil.
1531
1532** Terminal
1533
1534*** Functions to pop up menus and dialogs now work on all terminals,
1535including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1536`message-box', `yes-or-no-p', etc.
1537
1538The function `display-popup-menus-p' will now return non-nil for a
1539display or frame whenever a mouse is supported on that display or frame.
1540
1541*** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1542
1543*** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1544to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1545
1546** Minor internal changes to the details of lock files.
1547The lock for DIR/FILE is now _always_ DIR/.#FILE.
1548If DIR/.#FILE already exists and is not an Emacs lock file,
1549Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1550numbered lock files DIR/.#FILE.0...).
1551On file systems that do not support symbolic links, the lock is now a
1552regular file with contents being what would have been in the symlink.
1553
1554** New bool-vector set operation functions:
1555*** `bool-vector-exclusive-or'
1556*** `bool-vector-union'
1557*** `bool-vector-intersection'
1558*** `bool-vector-set-difference'
1559*** `bool-vector-not'
1560*** `bool-vector-subsetp'
1561*** `bool-vector-count-consecutive'
1562*** `bool-vector-count-population'
1563
1564** New library subr-x.el with miscellaneous small utility functions:
1565*** `hash-table-keys'
1566*** `hash-table-values'
1567*** `string-blank-p'
1568*** `string-empty-p'
1569*** `string-join'
1570*** `string-reverse'
1571*** `string-trim-left'
1572*** `string-trim-right'
1573*** `string-trim'
1574*** `string-remove-prefix'
1575*** `string-remove-suffix'
1576
1577** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1578
1579** The spelling of the rx.el category `chinese-two-byte' has been
1580corrected (the first 'e' was missing).
1581
1582** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1583*** object-name -> eieio-object-name
1584*** object-class -> eieio-object-class
1585*** object-class-fast -> eieio--object-class
1586*** object-class-name -> eieio-object-class-name
1587*** object-name-string -> eieio-object-name-string
1588*** object-num-slots -> eieio--object-num-slots
1589*** object-set-name-string -> eieio-object-set-name-string
1590*** class-of -> eieio-object-class
1591*** class-name -> eieio-class-name
1592*** class-parent -> eieio-class-parent
1593*** class-parents -> eieio-class-parents
1594*** class-parents-fast -> eieio-class-parents-fast
1595*** class-children -> eieio-class-children
1596*** class-num-slots -> eieio--class-num-slots
1597*** class-precedence-list -> eieio-class-precedence-list
1598*** class-direct-subclasses -> eieio-class-children
1599*** class-direct-superclasses -> eieio-class-parents
1600
1601** Obsoleted functions
1602*** `log10'
1603*** `dont-compile'
1604*** `lisp-complete-symbol'
1605*** `field-complete'
1606*** `minibuffer-completion-contents'
1607*** `isearch-nonincremental-exit-minibuffer'
1608*** `isearch-filter-visible'
1609*** `generic-make-keywords-list'
1610*** `get-upcase-table' (use `case-table-get-table' instead).
1611
1612** `with-wrapper-hook' is obsoleted by `add-function'.
1613The few hooks that used with-wrapper-hook are replaced as follows:
1614*** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1615*** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1616*** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1617
1618
1619* Changes in Emacs 24.4 on Non-Free Operating Systems
1620
1621** New Core Text based font backend for Mac OS X 10.5 and newer.
1622To use the old font backend, use the following on the command line:
1623 % defaults write org.gnu.Emacs FontBackend ns
1624GNUstep and Mac OS X 10.4 use the old font backend.
1625
1626** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1627default fullscreen method is now "native" fullscreen. To use the
1628old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1629
1630** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1631by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1632Note that this does not apply to images.
1633
1634** The procedure for building Emacs on MS-Windows has changed.
1635It is now built by running the same configure script as on all other
1636platforms. This requires the MSYS environment and MinGW development
1637tools. See the updated instructions in nt/INSTALL for details.
1638
1639Using the Posix configure script and Makefiles also means a change in
1640the directory structure of the Emacs installation on Windows. It is
1641now the same as on GNU and Unix systems. In particular, the auxiliary
1642programs, such as cmdproxy.exe and hexl.exe, are in
1643libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1644version), version-independent site-lisp is in share/emacs/site-lisp,
1645version-specific Lisp files are in share/emacs/VERSION/lisp and in
1646share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1647files are in share/emacs/VERSION/etc. (Emacs knows about all these
1648directories and will find the files in there automatically; there's no
1649need to set any variables due to this change.)
1650
1651** Emacs on Windows 2000 and later can now access files and directories
1652whose names cannot be encoded in the current system codepage.
1653
1654The new variable `w32-unicode-filenames' controls this feature: if it
1655is t, Emacs uses Unicode APIs to pass file names to system calls,
1656which lifts the limitation of file names to the current locale.
1657
1658** Lock files now work on MS-Windows.
1659This helps to prevent losing your edits if the same file is being
1660edited in another Emacs session or by another user. See the node
1661"Interlocking" in the Emacs User Manual for the details. To disable
1662file locking, customize `create-lockfiles' to nil.
1663
1664** The "generate a backtrace on fatal error" feature now works on MS-Windows.
1665The backtrace is written to the 'emacs_backtrace.txt' file in the
1666directory where Emacs was running.
1667
1668** The `network-interface-list' and `network-interface-info' functions
1669are now available on MS-Windows.
1670
1671** The variable `buffer-file-type' is no longer supported.
1672Setting it has no effect, and %t in the mode-line format is ignored.
1673Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1674modifying it has no effect.
1675
1676
1677* Installation Changes in Emacs 24.3
1678
1679** The default X toolkit is now Gtk+ version 3.
1680If you don't pass `--with-x-toolkit' to configure, or if you use
1681`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1682to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1683You can explicitly require a specific version by passing
1684`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1685
1686** New configure option `--enable-link-time-optimization', to utilize
1687an appropriate feature provided by GCC since version 4.5.0.
1688
1689** New configure option `--without-all' to disable most of the optional
1690features (image support, etc.) that are normally enabled by default.
1691
1692** New configure option `--enable-gcc-warnings' (for developing/debugging
1693Emacs). If building with GCC, this enables compile-time checks that
1694warn/give errors about possibly-questionable C code. On a recent GNU
1695system there should be no warnings; on older and on non-GNU systems
1696the results may be useful to developers.
1697
1698** The configure option `--enable-use-lisp-union-type' has been
1699renamed to `--enable-check-lisp-object-type', as the resulting
1700Lisp_Object type no longer uses a union to implement the compile time
1701check that this option enables.
1702
1703** The configure option `--disable-maintainer-mode' has been removed,
1704as it was confusingly-named and rarely useful.
1705
1706** The configure options `--program-prefix', `--program-suffix', and
1707`--program-transform-name' apply to more than just the installed
1708binaries. Now they also affect the man pages, icons, and the
1709etc/emacs.desktop file; but not the info pages, since this would break
1710links between the various manuals.
1711
1712** You can use `NO_BIN_LINK=t make install' to prevent the installation
1713overwriting "emacs" in the installation bin/ directory with a link
1714to "emacs-VERSION".
1715
1716** Emacs uses libtinfo in preference to libncurses, if available.
1717
1718** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1719/usr/pkg/lib to the linker search path. You must add them yourself if
1720you want them.
1721
1722** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1723(from the bin and libexec directories, respectively). The former is
1724no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1725
1726
1727* Startup Changes in Emacs 24.3
1728
1729** Emacs no longer searches for `leim-list.el' files beneath the standard
1730lisp/ directory. There should not be any there anyway. If you have
1731been adding them there, put them somewhere else; e.g., site-lisp.
1732
1733** The `--no-site-lisp' command line option now works for Nextstep builds.
1734
1735
1736* Changes in Emacs 24.3
1737
1738** Help
1739
1740*** `C-h f' (`describe-function') can now perform autoloading.
1741When this command is called for an autoloaded function whose docstring
1742contains a key substitution construct, that function's library is
1743automatically loaded, so that the documentation can be shown
1744correctly. To disable this, set `help-enable-auto-load' to nil.
1745
1746*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1747even after their associated libraries have been loaded (and the
1748autoloads have been redefined as functions).
1749
1750** ImageMagick
1751
1752*** Images displayed via ImageMagick now support transparency and the
1753:background image specification property.
1754
1755*** When available, ImageMagick support is automatically enabled.
1756It is no longer necessary to call `imagemagick-register-types'
1757explicitly to install ImageMagick image types; that function is called
1758automatically at startup, or when customizing an imagemagick- option.
1759
1760*** Setting `imagemagick-types-inhibit' to t now disables the use of
1761ImageMagick to view images. (You must call `imagemagick-register-types'
1762afterwards if you do not use customize to change this.)
1763
1764*** The new variable `imagemagick-enabled-types' also affects which
1765ImageMagick types are treated as images. The function
1766`imagemagick-filter-types' returns the list of types that will be
1767treated as images.
1768
1769** Minibuffer
1770
1771*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1772next and previous path separator, respectively.
1773
1774*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1775in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1776non-nil before enabling the mode.
1777
1778** Mode line
1779
1780*** New option `mode-line-default-help-echo' specifies the help text
1781(shown in a tooltip or in the echo area) for any part of the mode line
1782that does not have its own specialized help text.
1783
1784*** You can now click mouse-3 in the coding system indicator to invoke
1785`set-buffer-file-coding-system'.
1786
1787** Server and client
1788
1789*** emacsclient now obeys string values for `initial-buffer-choice',
1790if it is told to open a new frame without specifying any file to visit
1791or expression to evaluate.
1792
1793*** New option `server-auth-key' specifies a shared server key.
1794
1795** Emacs now generates backtraces on fatal errors.
1796On encountering a fatal error, Emacs now outputs a textual description
1797of the fatal signal, and a short backtrace on platforms like glibc
1798that support backtraces.
1799
1800** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1801This minor mode replaces `toggle-read-only', which is now obsolete.
1802
1803** Most `y-or-n' prompts now allow you to scroll the selected window.
1804Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1805respectively, without exiting from the prompt.
1806
1807** In the Package Menu, newly-available packages are listed as "new",
1808and sorted above the other "available" packages by default.
1809
1810** If your Emacs was built from a repository checkout, the new variable
1811`emacs-bzr-version' contains information about the bzr revision used.
1812
1813** New option `create-lockfiles' specifies usage of lockfiles.
1814It defaults to t. Changing it to nil inhibits the creation of lock
1815files (use this with caution).
1816
1817** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1818variables on remote hosts.
1819
1820** The entry for PCL-CVS has been removed from the Tools menu.
1821The PCL-CVS commands are still available via the keyboard.
1822
1823** Using "unibyte: t" in Lisp source files is obsolete.
1824Use "coding: raw-text" instead.
1825
1826** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1827has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1828The previous binding, introduced in Emacs 24.1, was a mistake, because
1829`C-c LETTER' bindings are reserved for user customizations.
1830
1831** Internationalization
1832
1833*** New language environment: Persian.
1834
1835*** New input method `vietnamese-vni'.
1836
1837** Nextstep (GNUstep / Mac OS X) port
1838
1839*** Support for fullscreen and the frame parameter fullscreen.
1840
1841*** A file dialog is used for open/save operations initiated from the
1842menu/toolbar.
1843
1844
1845* Editing Changes in Emacs 24.3
1846
1847** Search and Replace
1848
1849*** Non-regexp Isearch now performs "lax" space matching.
1850Each sequence of spaces in the supplied search string may match any
1851sequence of one or more whitespace characters, as specified by the
1852variable `search-whitespace-regexp'. (This variable is also used by a
1853similar existing feature for regexp Isearch.)
1854
1855*** New Isearch command `M-s SPC' toggles lax space matching.
1856This applies to both ordinary and regexp Isearch.
1857
1858*** New option `replace-lax-whitespace'.
1859If non-nil, `query-replace' uses flexible whitespace matching too.
1860The default is nil.
1861
1862*** Global `M-s _' starts a symbol (identifier) incremental search,
1863and `M-s _' in Isearch toggles symbol search mode.
1864`M-s c' in Isearch toggles search case-sensitivity.
1865
1866** Navigation commands
1867
1868*** New binding `M-g c' for `goto-char'.
1869
1870*** New binding `M-g TAB' for `move-to-column'.
1871
1872*** `M-g TAB' (`move-to-column') prompts for a column number if called
1873interactively with no prefix arg. Previously, it moved to column 1.
1874
1875** New option `yank-handled-properties' allows processing of text
1876properties on yanked text, in ways that are more general than just
1877removing them (as is done by `yank-excluded-properties').
1878
1879** New option `delete-trailing-lines' specifies whether
1880M-x delete-trailing-whitespace should delete trailing lines at the end
1881of the buffer. It defaults to t.
1882
1883** `C-u M-=' now counts lines/words/characters in the entire buffer.
1884
1885** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1886`ucs-insert' is now an obsolete alias for `insert-char'.
1887
1888** The `z' key no longer has a binding in most special modes.
1889It used to be bound to `kill-this-buffer', but `z' is too easy to
1890accidentally type.
1891
1892** New command `C-x r M-w' (`copy-rectangle-as-kill').
1893It copies the region-rectangle as the last rectangle kill.
1894
1895** Registers
1896
1897*** `C-x r +' is now overloaded to invoke `append-to-register'.
1898
1899*** New option `register-separator' specifies the register containing
1900the text to put between collected texts for use with
1901M-x append-to-register and M-x prepend-to-register.
1902
1903
1904* Changes in Specialized Modes and Packages in Emacs 24.3
1905
1906** Common Lisp emulation (CL)
1907
1908*** CL's main entry is now (require 'cl-lib).
1909`cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1910i.e., all its definitions have the "cl-" prefix (and internal definitions
1911use the "cl--" prefix).
1912
1913If `cl' provided a feature under the name `foo', then `cl-lib'
1914provides it under the name `cl-foo' instead; with the exceptions of the
1915few `cl' definitions that had to use `foo*' to avoid conflicts with
1916pre-existing Elisp entities. These have been renamed to `cl-foo'
1917rather than `cl-foo*'.
1918
1919The old `cl' is now deprecated and is mainly just a bunch of aliases that
1920provide the old, non-prefixed names. Some exceptions are listed below:
1921
1922*** `cl-flet' is not like `flet' (which is deprecated).
1923Instead it obeys the behavior of Common-Lisp's `flet'.
1924In particular, in cl-flet function definitions are lexically scoped,
1925whereas in flet the scoping is dynamic.
1926
1927*** `cl-labels' is slightly different from `labels'.
1928The difference is that it relies on the `lexical-binding' machinery
1929(as opposed to the `lexical-let' machinery used previously) to capture
1930definitions in closures, so such closures will only work if `lexical-binding'
1931is in use.
1932
1933*** `cl-letf' is not exactly like `letf'.
1934The only difference is in details that relate to some deprecated usage
1935of `symbol-function' in place forms.
1936
1937*** `progv' was rewritten to use the `let' machinery.
1938A side effect is that variables without corresponding values are bound
1939to nil rather than being made unbound.
1940
1941*** The following methods of extending `setf' are obsolete
1942(use features from gv.el instead):
1943`define-modify-macro' (use `gv-letplace')
1944`defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1945`define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1946`get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1947
1948** Diff mode
1949
1950*** Changes are now highlighted using the same color scheme as in
1951modern VCSes. Deletions are displayed in red (new faces
1952`diff-refine-removed' and `smerge-refined-removed', and new definition
1953of `diff-removed'), insertions in green (new faces `diff-refine-added'
1954and `smerge-refined-added', and new definition of `diff-added').
1955
1956*** The variable `diff-use-changed-face' defines whether to use the
1957face `diff-changed', or `diff-removed' and `diff-added' to highlight
1958changes in context diffs.
1959
1960*** The new command `diff-delete-trailing-whitespace' removes trailing
1961whitespace introduced by a diff.
1962
1963** Ediff now uses the same color scheme as Diff mode.
1964
1965** Python mode
1966
1967A new version of python.el, which provides several new features, including:
1968per-buffer shells, better indentation, Python 3 support, and improved
1969shell-interaction compatible with iPython (and virtually any other
1970text based shell).
1971
1972*** Some user options have been replaced/renamed, including (old -> new):
1973**** python-indent -> python-indent-offset
1974**** python-guess-indent -> python-indent-guess-indent-offset
1975**** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1976**** python-use-skeletons -> python-skeleton-autoinsert
1977
1978*** Some user options have been removed, including:
1979
1980**** `python-indent-string-contents': Strings are never indented.
1981
1982**** `python-honour-comment-indentation':
1983Comments are always considered as indentation markers.
1984
1985**** `python-continuation-offset': Indentation is automatically
1986calculated in a pep8 compliant way depending on the context.
1987
1988**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1989Have no direct mapping as the shell interaction is completely different.
1990
1991**** `python-python-command', `python-jython-command':
1992Replaced by `python-shell-interpreter'.
1993
1994**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1995`python-pdbtrack-minor-mode-string', `python-source-modes':
1996No longer relevant.
1997
1998*** Some commands have been replaced (old -> new):
1999**** python-insert-class -> python-skeleton-class
2000**** python-insert-def -> python-skeleton-def
2001**** python-insert-for -> python-skeleton-for
2002**** python-insert-if -> python-skeleton-if
2003**** python-insert-try/except -> python-skeleton-try
2004**** python-insert-try/finally -> python-skeleton-try
2005**** python-insert-while -> python-skeleton-while
2006**** python-find-function -> python-nav-jump-to-defun
2007**** python-next-statement -> python-nav-forward-sentence
2008**** python-previous-statement -> python-nav-backward-sentence
2009**** python-beginning-of-defun-function -> python-nav-beginning-of-defun
2010**** python-end-of-defun-function -> python-nav-end-of-defun
2011**** python-send-buffer -> python-shell-send-buffer
2012**** python-send-defun -> python-shell-send-defun
2013**** python-send-region -> python-shell-send-region
2014**** python-send-region-and-go -> emulate with python-shell-send-region
2015and python-shell-switch-to-shell
2016**** python-send-string -> python-shell-send-string
2017**** python-switch-to-python -> python-shell-switch-to-shell
2018**** python-describe-symbol -> python-eldoc-at-point
2019
2020** D-Bus
2021
2022*** New variables `dbus-compiled-version' and `dbus-runtime-version'.
2023
2024*** The D-Bus object manager interface is implemented.
2025
2026*** Variables of type :(u)int32 and :(u)int64 accept floating points,
2027if their value does not fit into Emacs's integer range.
2028
2029*** The function `dbus-call-method' is now non-blocking.
2030It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
2031
2032*** Signals can also be sent as unicast messages.
2033
2034*** The argument list of `dbus-register-signal' has been extended,
2035according to the new match rule types of D-Bus.
2036
2037*** `dbus-init-bus' supports private connections.
2038
2039*** There is a new function `dbus-setenv'.
2040
2041** `desktop-path' no longer includes the "." directory.
2042Desktop files are now located in ~/.emacs.d by default.
2043
2044** Dired
2045
2046*** `dired-do-async-shell-command' executes each file sequentially
2047if the command ends in `;' (when operating on multiple files).
2048Otherwise, it executes the command on each file in parallel.
2049
2050*** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
2051`dired-do-chown', and `dired-do-touch' yanks the attributes of the
2052file at point.
2053
2054*** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
2055`DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
2056mark/unmark/flag all files in the active region.
2057
2058*** The minibuffer default for `=' (`dired-diff') has changed.
2059It is now the backup file for the file at point, if one exists.
2060In Transient Mark mode the default is the file at the active mark.
2061
2062*** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
2063The global binding for `M-=', `count-words-region' is in effect.
2064
2065** ERC
2066
2067*** New module "notifications", which can send a notification when you
2068receive a private message or your nickname is mentioned.
2069
2070*** ERC will look up server/channel names via auth-source and use any
2071channel keys found.
2072
2073*** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
2074only applies to messages sent by lurkers.
2075
2076** reStructuredText mode
2077
2078*** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
2079fontification, comment handling, and customization have all been revised
2080and improved.
2081
2082*** Support for `imenu' and `which-function-mode'.
2083
2084*** The reStructuredText syntax is more closely covered.
2085Sphinx support has been improved.
2086
2087*** `rst-insert-list' inserts new list or continues existing lists.
2088
2089*** A negative prefix argument always works for `rst-adjust'.
2090
2091*** The window configuration is reset after displaying a TOC.
2092
2093*** The constant `rst-version' describes the rst.el package version.
2094
2095** Ruby mode
2096
2097*** Support for percent literals and recognition of regular expressions
2098in method calls without parentheses with more methods, including Cucumber
2099steps definitions.
2100
2101*** Improved syntax highlighting and indentation.
2102
2103*** New command `ruby-toggle-block', bound to `C-c {'.
2104
2105*** Some non-standard keybindings/commands have been removed:
2106
2107**** `ruby-electric-brace'; use `electric-indent-mode' instead.
2108
2109**** `ruby-mark-defun'; use `mark-defun'.
2110
2111**** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
2112appropriate settings for the variables `beginning-of-defun-function'
2113and `end-of-defun-function'.
2114
2115**** Non-standard keybindings for `backward-kill-word', `comment-region',
2116`reindent-then-newline-and-indent' and `newline' have been removed.
2117
2118** Shell Script mode
2119
2120*** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
2121
2122*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
2123
2124*** `sh-use-smie' lets you choose a new indentation and navigation code.
2125
2126** VHDL mode
2127
2128*** The free software compiler GHDL is supported (and now the default).
2129
2130*** Support for the VHDL-AMS packages has been added/updated.
2131
2132*** Updated to the 2002 revision of the VHDL standard.
2133
2134*** Accepts \r and \f as whitespace.
2135
2136** Apropos
2137
2138*** The faces used by Apropos are now directly customizable.
2139These faces are named `apropos-symbol', `apropos-keybinding', and so on;
2140see the `apropos' Custom group for details.
2141
2142*** The old options whose values specified faces to use have been removed
2143(i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
2144`apropos-match-face' and `apropos-property-face'.).
2145
2146** Buffer Menu
2147
2148*** This package has been rewritten to use Tabulated List mode.
2149
2150*** Option `Buffer-menu-buffer+size-width' is now obsolete.
2151Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
2152
2153** Calc
2154
2155*** Algebraic simplification mode is now the default.
2156To restrict to the limited simplifications given by the former
2157default simplification mode, use `m I'.
2158
2159** Calendar
2160
2161*** You can customize the header text that appears above each calendar month.
2162See the variable `calendar-month-header'.
2163
2164*** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
2165
2166*** The calendars produced by cal-html include holidays.
2167Customize `cal-html-holidays' to change this.
2168
2169** CEDET
2170
2171*** The major modes from the parser generators "Bovine" and "Wisent"
2172are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
2173are in `auto-mode-alist', and the corresponding manuals are included.
2174
2175*** EDE
2176
2177**** Menu support for the "Configuration" feature. This allows users to
2178choose the active configuration (such as debug or install) from the menu.
2179
2180**** New command `ede-set' to interactively set project-local variables.
2181
2182**** Support for compiling, debugging, and running in "generic" projects.
2183
2184**** Autoconf editing support for M4 macros with complex arguments.
2185
2186**** Compilation support for the "linux" project type.
2187
2188**** "simple" projects have been removed; use "generic" projects instead.
2189
2190*** Semantic
2191
2192**** Support for parsing #include statements inside a namespace in C/C++.
2193
2194**** Improved support for 'extern "C"' declarations in C/C++.
2195
2196**** The ability to ignore more common special C/C++ preprocessor symbols,
2197such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
2198If available, include cdefs.h as an additional source of preprocessor symbols.
2199
2200**** Improved C/C++ function pointer parsing.
2201
2202**** In Python, support for converting imports to include file names.
2203
2204**** Ability to dynamically determine the Python load path.
2205
2206**** Support for the Python 'WITH' and 'AT' keywords.
2207
2208**** Improved tooltip completion.
2209
2210*** SRecode
2211
2212**** The SRecode manual is now included.
2213
2214**** Tag generation supports constructor/destructor settings and system
2215include differentiation.
2216
2217**** Addition of 'Framework' support: Frameworks are specified when a
2218particular kind of library (such as Android) is needed in a common language
2219mode (like Java).
2220
2221**** Support for nested templates and let variables override based on priority.
2222
2223**** Support for merging tables from multiple related modes, such as
2224default -> c++ -> arduino.
2225
2226** Compile has a new option `compilation-always-kill'.
2227
2228** Customize
2229
2230*** `custom-reset-button-menu' now defaults to t.
2231
2232*** Non-option variables are never matched in `customize-apropos' and
2233`customize-apropos-options' (i.e., the prefix argument does nothing for
2234these commands now).
2235
2236** Term
2237
2238*** The variables `term-default-fg-color' and `term-default-bg-color'
2239are now deprecated in favor of the customizable face `term'.
2240
2241*** You can customize how to display ANSI terminal colors and styles
2242by customizing the corresponding `term-color-<COLOR>',
2243`term-color-underline' and `term-color-bold' faces.
2244
2245** Tramp
2246
2247*** The syntax has been extended in order to allow ad-hoc proxy definitions.
2248
2249*** Remote processes are now also supported on remote MS-Windows hosts.
2250
2251** URL
2252
2253*** Structs made by `url-generic-parse-url' have nil `attributes' slot.
2254Previously, this slot stored semicolon-separated attribute-value pairs
2255appended to some imap URLs, but this is not compatible with RFC 3986.
2256So now the `filename' slot stores the entire path and query components,
2257and the `attributes' slot is always nil.
2258
2259*** New function `url-encode-url' for encoding a URI string.
2260The `url-retrieve' function now uses this to encode its URL argument,
2261in case that is not properly encoded.
2262
2263** notifications.el supports now version 1.2 of the Notifications API.
2264The function `notifications-get-capabilities' returns the supported
2265server properties.
2266
2267** Flymake uses fringe bitmaps to indicate errors and warnings.
2268See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
2269`flymake-warning-bitmap'.
2270
2271** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
2272specifying URL types that should be converted to remote file names at
2273the FFAP prompt. The default is now '("ftp").
2274
2275** New Ibuffer `derived-mode' filter, bound to `/ M'.
2276The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
2277
2278** New option `mouse-avoidance-banish-position' specifies where the
2279`banish' mouse avoidance setting moves the mouse.
2280
2281** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
2282closing brackets to be aligned with the line of the opening bracket.
2283
2284** In Proced mode, new command `proced-renice' renices marked processes.
2285
2286** New option `async-shell-command-buffer' specifies the buffer to use
2287for a new asynchronous `shell-command' when the default output buffer
2288`*Async Shell Command*' is already in use.
2289
2290** SQL mode has a new option `sql-db2-escape-newlines'.
2291If non-nil, newlines sent to the command interpreter will be escaped
2292by a backslash. The default does not escape the newlines and assumes
2293that the sql statement will be terminated by a semicolon.
2294
2295** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
2296(and modes that derive from it), sorts the column at point, or the Nth
2297column if a numeric prefix argument is given.
2298
2299** `which-func-modes' now defaults to t, so Which Function mode, when
2300enabled, applies to all applicable major modes.
2301
2302** `winner-mode-hook' now runs when the mode is disabled, as well as when
2303it is enabled.
2304
2305** Follow mode no longer works by using advice.
2306The option `follow-intercept-processes' has been removed.
2307
2308** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
2309
2310** Hooks renamed to avoid obsolete "-hooks" suffix:
2311*** semantic-lex-reset-hooks -> semantic-lex-reset-functions
2312*** semantic-change-hooks -> semantic-change-functions
2313*** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
2314*** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
2315*** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2316*** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2317*** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2318*** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2319*** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2320*** rcirc-activity-hooks -> rcirc-activity-functions
2321*** rcirc-print-hooks -> rcirc-print-functions
2322*** dbus-event-error-hooks -> dbus-event-error-functions
2323*** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2324*** checkdoc-style-hooks -> checkdoc-style-functions
2325*** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2326*** archive-extract-hooks -> archive-extract-hook
2327*** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2328*** hfy-post-html-hooks -> hfy-post-html-hook
2329*** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2330*** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2331*** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2332*** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2333
2334** Obsolete packages
2335
2336*** assoc.el
2337In most cases, assoc+member+push+delq work just as well.
2338And in any case it's just a terrible package: ugly semantics, terrible
2339inefficiency, and not namespace-clean.
2340*** bruce.el
2341*** cust-print.el
2342*** ledit.el
2343*** mailpost.el
2344*** mouse-sel.el
2345*** patcomp.el
2346
2347
2348* Incompatible Lisp Changes in Emacs 24.3
2349
2350** Docstrings starting with `*' no longer indicate user options.
2351Only variables defined using `defcustom' are considered user options.
2352The function `user-variable-p' is now an obsolete alias for
2353`custom-variable-p'.
2354
2355** The return values of `defalias', `defun' and `defmacro' have changed,
2356and are now undefined. For backwards compatibility, `defun' and
2357`defmacro' currently return the name of the newly defined
2358function/macro, but this should not be relied upon.
2359
2360** `random' by default now returns a different random sequence in
2361every Emacs run. Use `(random S)', where S is a string, to set the
2362random seed to a value based on S, in order to get a repeatable
2363sequence in later calls.
2364
2365** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2366that substring is inserted literally even if the LITERAL arg is
2367non-nil, instead of causing an error to be signaled.
2368
2369** `select-window' now always makes the window's buffer current.
2370It does so even if the window was selected before.
2371
2372** The function `x-select-font' can return a font spec, instead of a
2373font name as a string. Whether it returns a font spec or a font name
2374depends on the graphical library.
2375
2376** `face-spec-set' no longer sets frame-specific attributes when the
2377third argument is a frame (that usage was obsolete since Emacs 22.2).
2378
2379** `set-buffer-multibyte' now signals an error in narrowed buffers.
2380
2381** The CL package's `get-setf-method' function no longer exists.
2382Generalized variables are now part of core Emacs Lisp, and implemented
2383differently to the way cl.el used to do it. It is not possible to
2384define a compatible replacement for `get-setf-method'. See the file
2385gv.el for internal details of the new implementation.
2386
2387** The arguments of `dbus-register-signal' are no longer just strings,
2388but keywords or keyword-string pairs. The old argument list will
2389still be supported for Emacs 24.x.
2390
2391** Miscellaneous name changes
2392Some Lisp symbols have been renamed to correct their spelling,
2393or to be more consistent with standard Emacs terminology.
2394
2395*** Renamed functions
2396**** hangul-input-method-inactivate -> hangul-input-method-deactivate
2397**** inactivate-input-method -> deactivate-input-method
2398**** quail-inactivate -> quail-deactivate
2399**** robin-inactivate -> robin-deactivate
2400**** viper-inactivate-input-method -> viper-deactivate-input-method
2401**** viper-inactivate-input-method-action ->
2402 viper-deactivate-input-method-action
2403**** ucs-input-inactivate -> ucs-input-deactivate
2404
2405*** Renamed hooks
2406The old hooks are still supported for backward compatibility, but they
2407are deprecated and will be removed eventually.
2408**** input-method-inactivate-hook -> input-method-deactivate-hook
2409**** robin-inactivate-hook -> robin-deactivate-hook
2410**** quail-inactivate-hook -> quail-deactivate-hook
2411
2412*** Renamed variables
2413**** follow-deactive-menu -> follow-inactive-menu
2414**** inactivate-current-input-method-function ->
2415 deactivate-current-input-method-function
2416
2417** Some obsolete functions, variables, and faces have been removed:
2418*** `last-input-char', `last-command-char', `unread-command-char'
2419*** `facemenu-unlisted-faces'
2420*** `rmail-decode-mime-charset'
2421*** `iswitchb-read-buffer'
2422*** `sc-version', `sc-submit-bug-report'
2423*** `set-char-table-default'
2424*** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2425*** `compile-internal'
2426*** `modeline'
2427*** `mode-line-inverse-video'
2428*** `follow-mode-off-hook'
2429*** `cvs-commit-buffer-require-final-newline'
2430(use `log-edit-require-final-newline' instead)
2431*** `cvs-changelog-full-paragraphs'
2432(use `log-edit-changelog-full-paragraphs' instead)
2433*** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2434*** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2435*** `vc-master-templates' (use `vc-handled-backends' instead)
2436*** `vc-checkout-carefully'
2437
2438
2439* Lisp Changes in Emacs 24.3
2440
2441** CL-style generalized variables are now in core Elisp.
2442`setf' is autoloaded; `push' and `pop' accept generalized variables.
2443You can define your own generalized variables using `gv-define-simple-setter',
2444`gv-define-setter', etc.
2445
2446** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2447This can significantly speed up execution of non-byte-compiled code,
2448but can also bump into previously unnoticed cyclic dependencies.
2449These are generally harmless: they will simply cause the macro calls
2450to be left for later expansion (as before), but will result in a
2451warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2452You may wish to restructure your code so this does not happen.
2453
2454** New sampling-based Elisp profiler.
2455Try M-x profiler-start, do some work, and then call M-x profiler-report.
2456When finished, use M-x profiler-stop. The sampling rate can be based on
2457CPU time or memory allocations.
2458
2459** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2460The interpretation of the DECLS is determined by `defun-declarations-alist'.
2461
2462** New macros `setq-local' and `defvar-local'.
2463
2464** Face underlining can now use a wave.
2465
2466** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2467of `read-regexp' accepts a string ending with a colon and space, and its
2468second argument DEFAULTS can be a list of strings accessible via `M-n'
2469in the minibuffer ahead of other hard-coded useful regexp-related values.
2470More commands use `read-regexp' now to read their regexp arguments.
2471
2472** Completion
2473
2474*** New function `completion-table-with-quoting' to handle completion
2475in the presence of quoting, such as file completion in shell buffers.
2476
2477*** New function `completion-table-subvert' to use an existing completion
2478table, but with a different prefix.
2479
2480** Debugger
2481
2482*** New error type and new function `user-error'.
2483These do not trigger the debugger.
2484
2485*** New option `debugger-bury-or-kill', saying what to do with the
2486debugger buffer when exiting debug.
2487
2488*** Set `debug-on-message' to enter the debugger when a certain
2489message is displayed in the echo area. This can be useful when trying
2490to work out which code is doing something.
2491
2492*** New var `inhibit-debugger', automatically set to prevent accidental
2493recursive invocations.
2494
2495** Window handling
2496
2497*** New command `fit-frame-to-buffer' adjusts the frame height to
2498fit the contents.
2499
2500*** The command `fit-window-to-buffer' can adjust the frame height
2501if the new option `fit-frame-to-buffer' is non-nil.
2502
2503*** New macro `with-temp-buffer-window', similar to
2504`with-output-to-temp-buffer'.
2505
2506*** `temp-buffer-resize-mode' no longer resizes windows that have been
2507reused.
2508
2509*** New option `switch-to-buffer-preserve-window-point' to restore a
2510window's point when switching buffers.
2511
2512*** New display action alist entries `window-height' and `window-width'
2513specify the size of new windows created by `display-buffer'.
2514
2515*** New display action alist entry `pop-up-frame-parameters', if
2516non-nil, specifies frame parameters to give any newly-created frame.
2517
2518*** New display action alist entry `inhibit-switch-frame', if non-nil,
2519tells display action functions to avoid changing which frame is
2520selected.
2521
2522*** New display action alist entry `previous-window', if non-nil,
2523specifies window to reuse in `display-buffer-in-previous-window'.
2524
2525*** New display action functions `display-buffer-below-selected',
2526and `display-buffer-in-previous-window'.
2527
2528*** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2529now accept a third argument to avoid choosing the selected window.
2530
2531*** Additional values recognized for option `window-combination-limit'.
2532
2533*** The following variables are obsolete, as they can be replaced by
2534appropriate entries in the `display-buffer-alist' function introduced
2535in Emacs 24.1:
2536**** `dired-shrink-to-fit'
2537**** `display-buffer-reuse-frames'
2538**** `display-buffer-function'
2539**** `special-display-buffer-names'
2540**** `special-display-frame-alist'
2541**** `special-display-function'
2542**** `special-display-regexps'
2543
2544** Time
2545
2546*** `current-time-string' no longer requires that its argument's year
2547must be in the range 1000..9999. It now works with any year supported
2548by the underlying C implementation.
2549
2550*** `current-time' now returns extended-format time stamps
2551(HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2552PSEC is typically a multiple of 1000 on current machines. Other
2553functions that use this format, such as `file-attributes' and
2554`format-time-string', have been changed accordingly. Old-format time
2555stamps are still accepted.
2556
2557*** The format of timers in `timer-list' and `timer-idle-list' is now
2558[TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2559The PSECS slot is new, and uses picosecond resolution. It can be
2560accessed via the new `timer--psecs' accessor.
2561
2562*** Last-modified time stamps in undo lists now are of the form
2563(t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2564
2565** EIEIO
2566
2567*** Improved security when handling persistent objects:
2568
2569**** `eieio-persistent-read' now features optional arguments for specifying
2570the class to load, as well as a flag stating whether subclasses are allowed;
2571if provided, other classes will be rejected by the reader. For
2572compatibility with existing code, if the class is omitted only a
2573warning is issued.
2574
2575**** New specialized reader for pulling in classes and signaling errors
2576without evaluation of suspicious code.
2577
2578**** All slots that contain objects must have a :type. Slots with lists
2579of objects must use a new type predicate for a list of an object type.
2580
2581*** Support for `find-function' and similar utilities, through the addition
2582of filename support to generated symbols.
2583
2584** Floating point functions now always return special values like NaN,
2585instead of signaling errors, if given invalid args; e.g., (log -1.0).
2586Previously, they returned NaNs on some platforms but signaled errors
2587on others. The affected functions are acos, asin, tan, exp, expt,
2588log, log10, sqrt, and mod.
2589
2590** New fringe bitmap `exclamation-mark'.
2591
2592** Miscellaneous changes to special forms and macros
2593
2594*** `defun' and `defmacro' are now macros rather than special forms.
2595
2596*** `kbd' is now a function rather than a macro.
2597
2598** Miscellaneous new functions
2599
2600*** `set-temporary-overlay-map' sets up a temporary keymap that
2601takes precedence over most other maps for a short while (normally one key).
2602
2603*** `autoloadp' tests if its argument is an autoloaded object.
2604
2605*** `autoload-do-load' performs the autoloading operation.
2606
2607*** `buffer-narrowed-p' tests if the buffer is narrowed.
2608
2609*** `file-name-base' returns a file name sans directory and extension.
2610
2611*** `function-get' fetches a function property, following aliases.
2612
2613*** `posnp' tests if an object is a `posn'.
2614
2615*** `system-users' returns the user names on the system.
2616
2617*** `system-groups' returns the group names on the system.
2618
2619*** `tty-top-frame' returns the topmost frame of a text terminal.
2620
2621** The following functions and variables are obsolete:
2622*** `automount-dir-prefix' (use `directory-abbrev-alist')
2623*** `buffer-has-markers-at'
2624*** `macro-declaration-function' (use `macro-declarations-alist')
2625*** `window-system-version' (provides no useful information)
2626*** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2627*** `query-replace-interactive'
2628*** `font-list-limit' (has had no effect since Emacs < 23)
2629
2630
2631* Changes in Emacs 24.3 on Non-Free Operating Systems
2632
2633** Cygwin builds can use the native MS Windows user interface.
2634Pass `--with-w32' to configure. The default remains the X11 interface.
2635
2636** Two new functions are available in Cygwin builds:
2637`cygwin-convert-file-name-from-windows' and
2638`cygwin-convert-file-name-to-windows'. These functions allow Lisp
2639code to access the Cygwin file-name mapping machinery to convert
2640between Cygwin and Windows-native file and directory names.
2641
2642** When invoked with the -nw switch to run on the Windows text-mode terminal,
2643Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2644`mouse-autoselect-window'.
2645
2646** On MS Windows Vista and later Emacs now supports symbolic links.
2647
2648** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2649support for libxml2, even if its presence is detected.
2650
2651** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2652
2653** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2654directories to the search path. You must add them yourself if you want them.
2655
2656
2657* Changes in Emacs 24.2
2658
2659** This is mainly a bug-fix release.
2660
2661
2662* Installation Changes in Emacs 24.1
2663
2664** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2665to configure. Note that other libraries used by Emacs, RSVG and GConf,
2666also depend on Gtk+. You can disable them with --without-rsvg and
2667--without-gconf.
2668
2669** Emacs can be compiled with GnuTLS support.
2670This happens by default if a suitably recent version of the library is
2671found at build time. To prevent this, use the configure option
2672`--without-gnutls'. See below for GnuTLS features.
2673
2674** Emacs can be compiled with SELinux support.
2675This happens by default if a suitably recent version of the library is
2676found at build time. To prevent this, use the configure option
2677`--without-selinux'. See below for SELinux features.
2678
2679** Emacs can be compiled with ImageMagick support.
2680This happens by default if a suitably recent version of the library is
2681found at build time. To prevent this, use the configure option
2682`--without-imagemagick'. See below for ImageMagick features.
2683This feature is not available for the Nextstep or MS ports.
2684
2685** Emacs can be compiled with libxml2 support.
2686This happens by default if a suitably recent version of the library is
2687found at build time. To prevent this, use the configure option
2688`--without-xml2'. See below for libxml2 features.
2689
2690** By default, the installed Info and man pages are compressed.
2691You can disable this by configuring --without-compress-info.
2692
2693** New configure option --with-wide-int.
2694With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2695On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2696to about 2 GiB.
2697
2698** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2699These provide no new functionality, they just remove the need to edit
2700lib-src/Makefile by hand in order to use the associated features.
2701
2702** New configure option --enable-use-lisp-union-type.
2703This is only useful for Emacs developers to debug certain types of bugs.
2704This is not a new feature; only the configure flag is new.
2705
2706** The standalone programs digest-doc and sorted-doc are removed.
2707Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2708
2709** The standalone program `fakemail' is removed.
2710If you need it, feedmail.el provides a superset of the functionality.
2711
2712
2713* Startup Changes in Emacs 24.1
2714
2715** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2716command line arguments, and the EMACS_UNIBYTE environment variable, no
2717longer have any effect. (They were declared obsolete in Emacs 23.)
2718
2719** New command line option `--no-site-lisp' removes site-lisp directories
2720from load-path. -Q now implies this. This option does not affect the
2721EMACSLOADPATH environment variable (and hence has no effect for
2722Nextstep builds).
2723
2724
2725* Changes in Emacs 24.1
2726
2727** Completion
2728
2729*** Many packages now use the `completion-at-point' command,
2730rather than implementing separate completion commands.
2731
2732*** `completion-at-point' now handles tags and semantic completion.
2733
2734*** Completion in a non-minibuffer now tries to detect the end of completion
2735and pops down the *Completions* buffer accordingly.
2736
2737*** New option `completion-cycle-threshold' allows completion cycling.
2738
2739*** New option `completion-category-overrides' for overriding the
2740default completion style in certain circumstances.
2741
2742*** New completion style `substring'.
2743
2744*** Completion of buffer names uses `substring' completion by default.
2745
2746*** The option `widget-complete-field' has been removed.
2747
2748** Mail changes
2749
2750*** The first time you try sending mail, Emacs asks for a mail method.
2751This is implemented by a new default for `send-mail-function', which
2752is `sendmail-query-once'. This offers to use the smtpmail package, or
2753to use the old defaults relying on external mail facilities
2754(`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2755`mailclient-send-it' on Windows).
2756
2757*** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2758transfers the report to your desktop's preferred mail client, if there
2759is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2760command.
2761
2762*** See Changes in Specialized Modes and Packages for SMTPmail changes
2763and Mail mode changes
2764
2765** Emacs server and client changes
2766
2767*** New option `server-port' specifies the port for TCP Emacs servers.
2768
2769*** New emacsclient argument -q/--quiet suppresses some status messages.
2770
2771*** New emacsclient argument --frame-parameters specifies the frame
2772parameters of any newly-created graphical frame.
2773
2774*** If emacsclient shuts down due to Emacs signaling an error,
2775its exit status is 1.
2776
2777*** New emacsclient argument --parent-id ID.
2778This opens a client frame in parent X window ID, via XEmbed, similar
2779to the --parent-id argument to Emacs.
2780
2781** Internationalization changes
2782
2783*** Emacs now supports display and editing of bidirectional text.
2784Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2785displayed in the correct visual order as expected by users of those
2786scripts. The display reordering is a "full bidirectionality" class
2787implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2788with no RTL text should look exactly the same as before.
2789
2790**** New buffer-local variable `bidi-display-reordering'.
2791To disable display reordering in a buffer, change this to nil.
2792
2793**** New buffer-local variable `bidi-paragraph-direction'.
2794If nil (the default), Emacs determines the base direction of each
2795paragraph from its text, as specified by the UBA. Setting the value
2796to `right-to-left' or `left-to-right' forces a base direction on each
2797paragraph.
2798
2799Paragraphs with right-to-left base direction are displayed starting at
2800the right window edge.
2801
2802*** Enhanced support for characters with no glyphs in available fonts,
2803or, on text terminals, characters that cannot be encoded by the
2804terminal coding system. The new option `glyphless-char-display-control'
2805specifies how to display them: as a hexadecimal code in a box, a thin
28061-pixel space, an empty box, etc.
2807
2808*** New input methods for Farsi and Bulgarian
2809(farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2810
2811*** `nobreak-char-display' now also highlights Unicode hyphen chars
2812(U+2010 and U+2011).
2813
2814*** New Hebrew translation of the Emacs Tutorial.
2815Type `C-u C-h t' to choose it in case your language setup doesn't
2816automatically select it.
2817
2818** An Emacs Lisp package manager is now included.
2819This is a convenient way to download and install additional packages,
2820from a package repository at http://elpa.gnu.org.
2821
2822*** M-x list-packages shows a list of packages, which can be
2823selected for installation.
2824
2825*** New command `describe-package', bound to `C-h P'.
2826
2827*** By default, all installed packages are loaded automatically when
2828Emacs starts up. To disable this, set `package-enable-at-startup' to
2829nil. To specify the packages to load, customize `package-load-list'.
2830
2831** Custom theme changes
2832
2833*** New command `M-x customize-themes', which provides a convenient
2834interface for enabling and disabling Custom themes.
2835
2836*** New option `custom-theme-load-path' is the load path for themes.
2837Emacs no longer looks for Custom themes in `load-path'. The default
2838value of `custom-theme-load-path' says to look for themes in
2839`custom-theme-directory', followed by a subdirectory of
2840`data-directory' named "themes/", which contains a small selection of
2841built-in Custom themes.
2842
2843*** New option `custom-safe-themes' records known-safe theme files.
2844If a theme is not in this list, Emacs queries before loading it, and
2845offers to save the theme to `custom-safe-themes' automatically. By
2846default, all themes included in Emacs are treated as safe.
2847
2848** Improved GTK integration
2849
2850*** GTK scroll-bars are now placed on the right by default.
2851The function `set-scroll-bar-mode' can change this.
2852
2853*** GTK tool bars can have just text, just images or images and text.
2854Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2855the default is taken from desktop settings.
2856
2857*** GTK tool bars can be placed on any edge of the frame.
2858The frame-parameter tool-bar-position controls this. It takes the
2859values top, left, right or bottom. The Options => Show/Hide menu has
2860entries for this.
2861
2862*** The default colors for selected text (the `region' face) are taken
2863from the GTK theme when Emacs is built with GTK.
2864
2865*** Emacs uses GTK tooltips by default if built with GTK.
2866You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2867
2868** Graphical interface changes
2869
2870*** On graphical displays, the mode-line no longer ends in dashes.
2871Also, the first dash (which does not indicate anything) is just
2872displayed as a space.
2873
2874*** `menu-bar-select-buffer-function' lets you choose another operation
2875instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2876
2877*** Lucid menus and dialogs can display antialiased fonts if Emacs is
2878built with Xft. These fonts can be set via X resources, for example:
2879Emacs.pane.menubar.font: Courier-12
2880
2881** Exiting changes
2882
2883*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2884or if it receives a SIGINT signal in batch mode.
2885
2886*** `kill-emacs-hook' is now also run in batch mode.
2887Third-party code which adds to `kill-emacs-hook' should check if they
2888do the right thing in batch mode.
2889
2890** Scrolling changes
2891
2892*** New scrolling commands `scroll-up-command' and `scroll-down-command'
2893(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2894of buffer at first key-press (instead they move to top/bottom of buffer)
2895when `scroll-error-top-bottom' is non-nil.
2896
2897*** New option `scroll-error-top-bottom' (see above).
2898
2899*** New scrolling commands `scroll-up-line' and `scroll-down-line'
2900scroll a line instead of full screen.
2901
2902*** New property `scroll-command' should be set on a command's symbol to
2903define it as a scroll command affected by `scroll-preserve-screen-position'.
2904
2905*** If you customize `scroll-conservatively' to a value greater than 100,
2906Emacs will never recenter point in the window when it scrolls due to
2907cursor motion commands or commands that move point (e.f., `M-g M-g').
2908Previously, you needed to use `most-positive-fixnum' as the value of
2909`scroll-conservatively' to achieve the same effect.
2910
2911*** "Aggressive" scrolling now honors the scroll margins.
2912If you customize `scroll-up-aggressively' or
2913`scroll-down-aggressively' and move point off the window, Emacs now
2914scrolls the window so as to avoid positioning point inside the scroll
2915margin.
2916
2917** Basic SELinux support has been added.
2918This requires Emacs to be linked with libselinux at build time.
2919
2920*** Emacs preserves the SELinux file context when backing up.
2921Also, the function `copy-file' has an extra optional argument for
2922preserving SELinux context, and the return value of `backup-buffer'
2923now includes the SELinux context.
2924
2925*** New functions `file-selinux-context' and `set-file-selinux-context'
2926get and set the SELinux context of a file.
2927
2928** Trash changes
2929
2930*** `delete-by-moving-to-trash' now only affects commands that specify
2931trashing. This avoids inadvertently trashing temporary files.
2932
2933*** Calling `delete-file' or `delete-directory' with a prefix argument
2934now forces true deletion, regardless of `delete-by-moving-to-trash'.
2935
2936** File- and directory-local variable changes
2937
2938*** You can stop directory local vars from applying to subdirectories.
2939Add an element (subdirs . nil) to the alist portion of any variables
2940settings to indicate that the section should not apply to
2941subdirectories.
2942
2943*** Directory local variables can apply to some file-less buffers.
2944Affected modes include dired, vc-dir, and log-edit. For example,
2945adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2946turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2947`hack-dir-local-variables-non-file-buffer' to support this.
2948
2949*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2950Instead, use "eval: (minor-mode 1)".
2951
2952*** The variable `inhibit-first-line-modes-regexps' has been renamed
2953to `inhibit-local-variables-regexps'. As the name suggests, it now
2954applies to ALL file local variables, not just -*- lines. The
2955associated `inhibit-first-line-modes-suffixes' has been renamed in the
2956corresponding way.
2957
2958** Window changes
2959
2960*** The `quit-window' command now restores the last buffer displayed
2961in the quitted window.
2962
2963*** Resizing an Emacs frame now preserves proportional window sizes,
2964modulo restrictions like window minimum sizes and fixed-size windows.
2965
2966*** The behavior of `display-buffer' is now customizable in detail.
2967
2968**** New option `display-buffer-base-action' specifies a list of
2969user-determined display "actions" (functions and optional arguments
2970for choosing the displaying window).
2971
2972This takes precedence over the default display action, which is
2973specified by `display-buffer-fallback-action'.
2974
2975**** New option `display-buffer-alist' maps buffer name regexps to
2976display actions, taking precedence over `display-buffer-base-action'.
2977
2978*** New option `window-combination-limit'.
2979The new option `window-combination-limit' allows to return the space
2980obtained for resizing or creating a window more reliably to the window
2981from which such space was obtained.
2982
2983*** New option `window-combination-resize'.
2984The new option `window-combination-resize' allows to split a window that
2985otherwise cannot be split because it's too small by stealing space from
2986other windows in the same combination. Subsequent resizing or deletion
2987of the window will resize all windows in the same combination as well.
2988
2989*** New option `frame-auto-hide-function' lets you choose between
2990iconifying or deleting a frame when burying a buffer in a dedicated
2991frame, or quitting a window showing a buffer in a frame of its own.
2992
2993*** New commands `maximize-window' and `minimize-window'.
2994These maximize and minimize the size of a window within its frame.
2995
2996*** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2997These functions allow to navigate through the live buffers that have
2998been shown in a specific window.
2999
3000** Minibuffer changes
3001
3002*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
3003This is handy for minibuffer-only frames, and is also used for the feature
3004where mouse-1 pops up *Messages*"', which can now easily be changed.
3005
3006*** Minibuffers set `truncate-lines' to nil.
3007If you want to change the value to something else, you could use
3008for example `minibuffer-setup-hook'.
3009
3010** `auto-mode-case-fold' is now enabled by default.
3011
3012** `backup-by-copying-when-mismatch' now defaults to t.
3013
3014** New basic faces `error', `warning', `success'.
3015These are used to highlight text indicating failure, caution or
3016successful operation.
3017
3018** New option `list-colors-sort' defines the color sort order
3019for `list-colors-display'.
3020
3021** The variable `focus-follows-mouse' now always defaults to nil.
3022
3023
3024* Editing Changes in Emacs 24.1
3025
3026** Search changes
3027
3028*** C-y in Isearch is now bound to `isearch-yank-kill', instead of
3029`isearch-yank-line'.
3030
3031*** M-y in Isearch is now bound to `isearch-yank-pop', instead of
3032`isearch-yank-kill'.
3033
3034*** M-s C-e in Isearch is now bound to `isearch-yank-line'.
3035
3036** New commands `count-words-region' and `count-words'.
3037
3038*** M-= is bound to `count-words-region', not `count-lines-region'.
3039The `count-words-region' command, when called interactively, reports
3040the number of lines, words, and characters in the region. It is a
3041superset of the old `count-lines-region', which is now an obsolete
3042alias for it.
3043
3044** The command `just-one-space' (M-SPC), if given a negative argument,
3045also deletes newlines around point.
3046
3047** Deletion changes
3048
3049*** New option `delete-active-region'.
3050If non-nil, [delete] and DEL delete the region if it is active and no
3051prefix argument is given. If set to `kill', those commands kill
3052instead.
3053
3054*** New command `delete-forward-char', bound to [delete].
3055This is meant for interactive use, and obeys `delete-active-region'.
3056The command `delete-char' does not obey `delete-active-region'.
3057
3058*** `delete-backward-char' is now a Lisp function.
3059Apart from obeying `delete-active-region', its behavior is unchanged.
3060However, the byte compiler now warns if it is called from Lisp; Lisp
3061callers should use delete-char with a negative argument instead.
3062
3063*** The option `mouse-region-delete-keys' has been deleted.
3064
3065** Selection changes.
3066
3067The default handling of clipboard and primary selections has been
3068changed to conform with modern X applications. In short, most
3069commands for killing and yanking text now use the clipboard, while
3070mouse commands use the primary selection.
3071
3072In the following, we provide a list of these changes, followed by a
3073list of steps to get the old behavior back if you prefer that.
3074
3075*** `select-active-regions' now defaults to t.
3076Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
3077the kill ring. The selected text is put in the primary selection, if
3078the system possesses a separate primary selection facility (e.g. X).
3079
3080**** `select-active-regions' also accepts a new value, `only'.
3081This means to only set the primary selection for temporarily active
3082regions (usually made by mouse-dragging or shift-selection);
3083"ordinary" active regions, such as those made with C-SPC followed by
3084point motion, do not alter the primary selection.
3085
3086**** `mouse-drag-copy-region' now defaults to nil.
3087
3088*** mouse-2 is now bound to `mouse-yank-primary'.
3089This pastes from the primary selection, ignoring the kill-ring.
3090Previously, mouse-2 was bound to `mouse-yank-at-click'.
3091
3092*** `x-select-enable-clipboard' now defaults to t on all platforms.
3093
3094*** `x-select-enable-primary' now defaults to nil.
3095Thus, commands that kill text or copy it to the kill-ring (such as
3096M-w, C-w, and C-k) also use the clipboard---not the primary selection.
3097
3098**** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
3099exactly equivalent to M-w, C-w, and C-y respectively.
3100
3101**** Note that on MS-Windows, `x-select-enable-clipboard' was already
3102non-nil by default, as Windows does not support the primary selection
3103between applications.
3104
3105*** To return to the previous behavior, do the following:
3106
3107**** Change `select-active-regions' to nil.
3108**** Change `mouse-drag-copy-region' to t.
3109**** Change `x-select-enable-primary' to t (on X only).
3110**** Change `x-select-enable-clipboard' to nil.
3111**** Bind `mouse-yank-at-click' to mouse-2.
3112
3113*** Support for X cut buffers has been removed.
3114
3115*** X clipboard managers are now supported.
3116To inhibit this, change `x-select-enable-clipboard-manager' to nil.
3117
3118** New command `C-x r N' (`rectangle-number-lines') numbers the lines
3119in the current rectangle. With a prefix argument, this prompts for a
3120number to count from and for a format string.
3121
3122** `redisplay-dont-pause' now defaults to t.
3123This makes Emacs feel more responsive to editing commands that arrive
3124at high rate, e.g. if you lean on some key, because stopping redisplay
3125in the middle (when this variable is nil) forces more expensive
3126updates later on, and Emacs appears to be unable to keep up.
3127
3128** The behavior of <TAB> for active regions in Text mode has changed.
3129In Text and related modes, typing <TAB> (`indent-for-tab-command')
3130when the region is active causes Emacs to indent all the lines in the
3131region, aligning them with the line previous to the first line in the
3132region (or with the left margin if there is no previous line).
3133
3134** When `occur' is called with a prefix argument, matching strings are
3135collected into the `*Occur*' buffer without line numbers. If there
3136are parenthesized subexpressions in the specified regexp, `occur'
3137reads replacement text that may contain \\& and \\N whose convention
3138follows `replace-match'.
3139
3140
3141* Changes in Specialized Modes and Packages in Emacs 24.1
3142
3143** Archive Mode has basic support for browsing and updating 7z archives.
3144
3145** BibTeX mode
3146
3147*** BibTeX mode now supports biblatex.
3148Use the variable `bibtex-dialect' to select different BibTeX dialects.
3149`bibtex-entry-field-alist' is now an obsolete alias for
3150`bibtex-BibTeX-entry-alist'.
3151
3152*** New command `bibtex-search-entries', bound to C-c C-a.
3153
3154*** New `bibtex-entry-format' option `sort-fields', disabled by default.
3155
3156*** New variable `bibtex-search-entry-globally'.
3157
3158** Browse-url
3159
3160*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
3161
3162*** The default browser used by the package is now the "xdg-open" program,
3163on platforms that support it. This calls your desktop's preferred browser.
3164
3165** Calc
3166
3167*** Support for musical notes.
3168
3169*** Support for logarithmic units.
3170
3171*** No longer uses the tex prefix for TeX specific unit names when
3172using TeX or LaTeX mode.
3173
3174*** New option to highlight selections using faces.
3175
3176*** `calc-histogram' has the option of using a vector to determine the bins.
3177
3178*** New "O" option prefix.
3179
3180*** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
3181
3182** Calendar, Diary, and Appt
3183
3184*** Diary entries can contain non-printing "comments".
3185See the variable `diary-comment-start'.
3186
3187*** Appointments can specify their individual warning times.
3188See the variable `appt-warning-time-regexp'.
3189
3190*** The function specified by `appt-disp-window-function' may be passed
3191lists of arguments if multiple appointments are due at similar times.
3192If you are using a custom function for this, you should update it.
3193
3194*** New function `diary-hebrew-birthday'.
3195
3196*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
3197may no longer be nil, but must all be strings.
3198
3199*** The obsolete (since Emacs 22.1) method of enabling the appt
3200package by adding `appt-make-list' to `diary-hook' has been removed.
3201Use `appt-activate' instead.
3202
3203*** Some appt variables (obsolete since Emacs 22.1) have been removed:
3204appt-issue-message (use the function appt-activate)
3205appt-visible/appt-msg-window (use the variable appt-display-format)
3206
3207*** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
3208view-diary-entries, list-diary-entries, show-all-diary-entries
3209
3210** CC Mode
3211
3212*** New feature to "guess" the style in an existing buffer.
3213The main entry point is M-x c-guess.
3214
3215*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
3216
3217*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
3218Thus C-M-a will, by default, go to the beginning of the immediate function,
3219not the top level.
3220
3221*** "Macros with semicolons" can be registered for correct indentation.
3222Where such a macro ends a line (no semicolon) the next statement is no longer
3223parsed as a statement continuation.
3224
3225** Comint and modes derived from it use the standard completion code.
3226
3227** Compilation mode
3228
3229*** Compilation mode can be used without Font Lock mode.
3230`compilation-parse-errors-function' is now obsolete.
3231
3232*** New variable `compilation-filter-start', which is bound while
3233`compilation-filter-hook' runs. It records the start position of the
3234text inserted by `compilation-filter'.
3235
3236*** `compilation-error-screen-columns' and `compilation-first-column'
3237are obeyed in the editing buffer. So programming language modes can
3238set them, whereas previously only the value in the *Compilation*
3239buffer was used.
3240
3241** Customize
3242
3243*** Customize buffers now contain a search field.
3244The search is performed using `customize-apropos'.
3245To turn off the search field, set `custom-search-field' to nil.
3246
3247*** Options in customize group buffers start out hidden if not customized.
3248Use the arrow to the left of the option name to toggle visibility.
3249
3250*** custom-buffer-sort-alphabetically now defaults to t.
3251
3252*** The color widget now has a "Choose" button, which allows you to
3253choose a color via `list-colors-display'.
3254
3255** D-Bus
3256
3257*** It is now possible to access buses other than the default system
3258or session bus.
3259
3260*** The `dbus-register-method' and `dbus-register-property' functions
3261optionally do not register names.
3262
3263*** The new function `dbus-register-service' registers a known service
3264name on a D-Bus without also registering a property or a method.
3265
3266** Dired-x
3267
3268*** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
3269if called with a prefix argument, read a file name from the minibuffer
3270instead of using the current buffer.
3271
3272*** The "dired local variables" feature of Dired-x is obsolete.
3273The standard directory local variables feature replaces it.
3274
3275** ERC changes
3276
3277*** New options `erc-autojoin-timing' and `erc-autojoin-delay',
3278controlling attempts to autojoin a channel.
3279
3280*** New variable `erc-coding-system-precedence': If we use `undecided'
3281as the server coding system, this variable will then be consulted.
3282The default is to decode strings that can be decoded as utf-8 as
3283utf-8, and do the normal `undecided' decoding for the rest.
3284
3285** Eshell changes
3286
3287*** The default value of `eshell-directory-name' has changed
3288to be an "eshell" directory in `user-emacs-directory'.
3289The old "~/.eshell/" directory is still used if it exists, though.
3290
3291** gdb-mi
3292
3293*** The M-x gdb command now uses the GDB Machine Interface protocol.
3294It now supports multithread non-stop debugging and simultaneous
3295debugging of several threads.
3296
3297** Image mode
3298
3299*** RET (`image-toggle-animation') toggles animation, if applicable.
3300Animation plays once, unless the option `image-animate-loop' is non-nil.
3301
3302** Info
3303
3304*** New command M-x info-display-manual displays a named Info manual.
3305If that manual is already visited in some Info buffer, it displays
3306that buffer. (This is handy if you have many manuals in many *info*
3307buffers, and don't remember the name of the buffer visiting the manual
3308you want to consult.) Otherwise, it loads and displays the manual.
3309
3310*** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
3311This is for compatibility with the stand-alone Info reader program,
3312and also because `Info-edit' is a rarely used command that is disabled
3313by default.
3314
3315** Mail mode changes (not Message mode)
3316
3317*** New command M-x mail-add-attachment for adding MIME attachments
3318
3319*** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3320(Its name is misleading, since it has nothing to do with MIME
3321attachments.) The old name is now an obsolete alias to the new name.
3322
3323** MH-E has been updated to MH-E version 8.3.1.
3324See MH-E-NEWS for details.
3325
3326** Modula-2 mode provides auto-indentation.
3327
3328** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3329
3330** nXML mode no longer binds C-RET to `nxml-complete'.
3331Completion is now performed via `completion-at-point', bound to C-M-i
3332or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3333default), this performs tag completion.
3334
3335** Org mode has been updated to version 7.8.09.
3336See ORG-NEWS for details.
3337
3338** Prolog mode has been completely revamped, with lots of additional
3339functionality such as more intelligent indentation, electricity,
3340support for more variants, including Mercury, and a lot more.
3341
3342** Rmail
3343
3344*** The command `rmail-epa-decrypt' decrypts OpenPGP data
3345in the Rmail incoming message.
3346
3347*** The variable `rmail-message-filter' no longer has any effect.
3348This change was made in Emacs 23.1 but was not advertised at the time.
3349Try using `rmail-show-message-hook' instead.
3350
3351** Shell mode
3352
3353*** M-x shell prompts for the shell path name if the default directory
3354is a remote file name and neither the environment variable $ESHELL nor
3355the variable `explicit-shell-file-name' is set.
3356
3357*** TAB is now bound to the standard `completion-at-point' command,
3358which now implements the pcomplete rules for shell command completion.
3359
3360** SMTPmail
3361
3362*** SMTPmail now uses encrypted connections (via STARTTLS) by default
3363if the mail server supports them. This uses either built-in GnuTLS
3364support, or the starttls.el library. Customize `smtpmail-stream-type'
3365to change this.
3366
3367*** The variable `smtpmail-auth-credentials' has been removed.
3368By default, the information is now stored in the file ~/.authinfo.
3369This was the default value of smtpmail-auth-credentials. If you had
3370customized smtpmail-auth-credentials to a list of user names and
3371passwords, those settings are not used. During your first connection
3372to the smtp server, Emacs will prompt for the user name and password,
3373and offer to save them to ~/.authinfo. Or you can manually copy the
3374credentials to ~/.authinfo. For example, if you had
3375
3376 (setq smtpmail-auth-credentials
3377 '(("mail.example.org" 25 "jim" "s!cret")))
3378
3379then the equivalent line in ~/.authinfo would be
3380
3381 machine mail.example.org port 25 login jim password s!cret
3382
3383See the auth-source manual for more information, e.g. on encrypting
3384the credentials file.
3385
3386*** The variable `smtpmail-starttls-credentials' has been removed.
3387If you had that set, you need to put
3388
3389 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3390
3391in your ~/.authinfo file instead.
3392
3393*** SMTPmail defaults to using the address in the From: header as the
3394SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3395to the address you wish to use instead.
3396
3397** SQL mode
3398
3399*** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3400and `sql-oracle-scan-on'.
3401
3402*** New options controlling prompting for login parameters.
3403Each supported product has a custom variable `sql-*-login-params',
3404which is a list of the parameters to be prompted for before a
3405connection is established.
3406
3407*** The command `sql-product-interactive' now takes a prefix argument,
3408which causes it to prompt for an SQL product.
3409
3410*** Product-specific SQL interactive commands now take prefix arguments.
3411These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3412given a prefix argument, prompt for a name for the SQL interactive
3413buffer. This reduces the need for calling `sql-rename-buffer'.
3414
3415*** SQL interactive modes suppress command continuation prompts, and
3416replace tabs with spaces. The first change impacts multiple line SQL
3417statements entered with C-j between each line, statements yanked into
3418the buffer and statements sent with `sql-send-*' functions. The
3419second prevents the MySQL and Postgres interpreters from listing
3420object name completions when sent text via `sql-send-*' functions.
3421
3422*** New command `sql-connect' starts a predefined SQLi session,
3423using the login parameters from `sql-connection-alist'.
3424
3425*** New "Save Connection" menu item in SQLi buffers.
3426This gathers the login params specified for the SQLi session, if it
3427was not started by a connection, and saves them as a new connection.
3428
3429*** New commands for listing database objects and details:
3430sql-list-all and sql-list-table.
3431
3432*** An API for manipulating SQL product definitions has been added.
3433
3434** TeX modes
3435
3436*** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3437
3438** Tramp
3439
3440*** New inline access method "ksu" (kerberized su).
3441
3442*** The following access methods are discontinued: "ssh1_old",
3443"ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3444
3445*** The user option `remote-file-name-inhibit-cache' controls whether
3446remote file attributes are cached for better performance.
3447
3448*** The option `ange-ftp-binary-file-name-regexp' has changed its
3449default value to "".
3450
3451*** Handlers for `file-selinux-context' and `set-file-selinux-context'
3452for remote machines which support SELinux.
3453
3454** New function `url-queue-retrieve', which behaves like url-retrieve,
3455but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3456the degree of parallelism.
3457
3458** VC and related modes
3459
3460*** Support for pulling on distributed version control systems.
3461The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3462supported (currently with Bzr, Git, and Mercurial), to update the
3463current branch and working tree. A prefix argument means to prompt
3464the user for specifics, e.g. a pull location.
3465
3466*** `vc-update' is now an alias for `vc-pull'.
3467
3468*** Support for merging on distributed version control systems.
3469The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3470is supported (currently with Bzr, Git, and Mercurial), to merge
3471changes from another branch into the current one. It prompts for
3472specifics, e.g. a merge source.
3473
3474*** New option `vc-revert-show-diff' controls whether `vc-revert'
3475shows a diff while querying the user. It defaults to t.
3476
3477*** Log entries in some Log View buffers can be toggled to display a
3478longer description by typing RET (log-view-toggle-entry-display).
3479This is currently supported for Bzr, Git, and Mercurial (to support
3480another backend, define a `log-view-expanded-log-entry-function').
3481In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3482use this to display the full log entry for the revision at point.
3483
3484*** New command `vc-ediff' allows visual comparison of two revisions
3485of a file similar to `vc-diff', but using ediff backend.
3486
3487*** The option `vc-initial-comment' was removed in Emacs 23.2, but
3488this was not advertised at the time.
3489
3490*** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3491Since Emacs 23, it has done the same thing as `toggle-read-only', but
3492this was not advertised at the time.
3493
3494** Obsolete modes
3495
3496*** abbrevlist.el
3497
3498*** erc-hecomplete.el (use erc-pcomplete.el instead)
3499
3500*** partial-completion-mode (complete.el) is obsolete.
3501You can get a comparable behavior with:
3502(setq completion-styles '(partial-completion initials))
3503(setq completion-pcm-complete-word-inserts-delimiters t)
3504
3505*** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3506
3507*** pgg is obsolete (use EasyPG instead).
3508
3509*** sregex.el is obsolete, since rx.el is a strict superset.
3510
3511*** s-region.el and pc-select.el are obsolete.
3512They are superseded by shift-select-mode, enabled by default since 23.1.
3513
3514*** vc-mcvs.el is obsolete (for lack of a maintainer).
3515
3516** Miscellaneous
3517
3518*** The Landmark game is now invoked with `landmark', not `lm'.
3519Its functions and variables have been similarly renamed.
3520
3521*** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3522(This interfered with cua-mode.)
3523
3524*** f90.el has some support for Fortran 2008 syntax.
3525
3526*** `copyright-fix-years' can optionally convert consecutive years to ranges.
3527
3528*** New command `nato-region' converts text to NATO phonetic alphabet.
3529
3530
3531* New Modes and Packages in Emacs 24.1
3532
3533** Occur Edit mode applies edits made in *Occur* buffers to the
3534original buffers. It is bound to "e" in Occur mode.
3535
3536** New global minor mode electric-pair-mode.
3537When enabled, typing an open parenthesis automatically inserts the
3538matching closing one.
3539
3540** New global minor mode electric-indent-mode.
3541When enabled, typing certain characters triggers reindentation.
3542Major modes wishing to use this can set electric-indent-chars or
3543electric-indent-functions.
3544
3545** New global minor mode electric-layout-mode.
3546When enabled, typing certain characters automatically inserts newlines.
3547Major modes wishing to use this can set electric-layout-rules.
3548
3549** tabulated-list.el provides a generic major mode for tabulated data,
3550from which other modes can be derived.
3551
3552** pcase.el provides the ML-style pattern matching macro `pcase'.
3553
3554** secrets.el is an implementation of the Secret Service API, an
3555interface to password managers like GNOME Keyring or KDE Wallet. The
3556Secret Service API requires D-Bus for communication. The command
3557`secrets-show-secrets' offers a buffer with a visualization of the
3558secrets.
3559
3560** notifications.el provides an implementation of the Desktop
3561Notifications API. It requires D-Bus for communication.
3562
3563** soap-client.el supports access to SOAP web services from Emacs.
3564soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3565
3566** New generic mode, xmodmap-generic-mode, for xmodmap files.
3567
3568** New emacs-lock.el package.
3569The previous version has been moved to obsolete/old-emacs-lock.el.
3570Now, there is a proper minor mode `emacs-lock-mode'. Protection
3571against exiting Emacs and killing the buffer can be set separately.
3572The mechanism for automatically turning off protection for buffers
3573with dead inferior processes has been generalized.
3574
3575
3576* Incompatible Lisp Changes in Emacs 24.1
3577
3578** Passing a nil argument to a minor mode function call now ENABLES
3579the minor mode unconditionally. This is so that you can write e.g.
3580
3581 (add-hook 'text-mode-hook 'foo-mode)
3582
3583to enable foo-mode in Text mode buffers, removing the need for
3584`turn-on-foo-mode' style functions. This affects all mode commands
3585defined by `define-minor-mode'. If called interactively, the mode
3586command still toggles the minor mode.
3587
3588** The return value of `backup-buffer' has changed.
3589It is now a list of three elements, where the second element is a list
3590describing the original file's SELinux context. If Emacs or the
3591system lacks SELinux support, the context list is (nil nil nil nil).
3592See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3593
3594** `char-direction-table' and the `char-direction' function were deleted.
3595They were buggy and inferior to the new support of bidirectional
3596editing introduced in Emacs 24. If you need the bidirectional
3597properties of a character, use `get-char-code-property' with the last
3598argument `bidi-class'.
3599
3600** `copy-directory' now copies the source directory as a subdirectory
3601of the target directory, if the latter is an existing directory. The
3602new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3603the contents directly into a pre-existing target directory.
3604
3605** For mouse click input events in the text area, the Y pixel
3606coordinate in the POSITION list now counts from the top of the text
3607area, excluding any header line. Previously, it counted from the top
3608of the header line.
3609
3610** Support for "old-style" backquotes, obsolete for 10+ years, has
3611been further reduced. Now a backquote not followed by a space is
3612always treated as a "new-style" backquote. Please remove all
3613"old-style" backquotes from your code. If your code uses backquotes
3614as documented in the Elisp manual, and compiles without warning, then
3615you have nothing to do in this regard. Code not following the
3616appropriate conventions may fail to compile.
3617
3618The most common cause of trouble seems to be an old-style backquote
3619followed by a newline. Another cause of trouble is vector notation
3620for key sequence notation: instead of [(control ,)] and [(control ')],
3621you should write [(control ?,)] and [(control ?')], which will work in
3622older Emacsen too.
3623
3624** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3625was not advertised at the time. The function `custom-initialize-delay'
3626replaced all known uses.
3627
3628** `view-buffer' now treats special mode-class in the same way that
3629`view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3630major mode is special).
3631
3632** Menu and tool bar changes
3633
3634*** During startup, Emacs no longer adds entries for `menu-bar-lines'
3635and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3636With these alist entries omitted, `make-frame' checks the value of the
3637variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3638a menu-bar or tool-bar, respectively. If the alist entries are added,
3639they override the value of `menu-bar-mode'/`tool-bar-mode'.
3640
3641*** The menu bar bindings's caches are not used any more.
3642Use (where-is-internal <def> nil t) instead.
3643
3644** Regions created by mouse dragging are now normal active regions,
3645similar to those created by shift-selection (see Selection changes
3646above). In previous Emacs versions, these regions were delineated by
3647`mouse-drag-overlay'; that variable has been removed.
3648
3649** The fourth argument of `filter-buffer-substring' has been removed.
3650If you want to remove text properties from the final result, simply
3651pass the result through substring-no-properties.
3652
3653** cl.el no longer provides `cl-19'.
3654
3655** The following obsolete functions and aliases have been removed
3656(the appropriate new function is given in parentheses; "not needed"
3657means you can just remove all calls to the function in question):
3658
3659*** `comint-kill-output' (`comint-delete-output')
3660*** `decompose-composite-char' (`char-to-string')
3661*** `outline-visible' (`outline-invisible-p')
3662*** `internal-find-face' (`facep')
3663*** `internal-get-face' (`facep and check-face')
3664*** `frame-update-faces' (not needed)
3665*** `frame-update-face-colors' (`frame-set-background-mode')
3666*** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3667*** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3668*** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3669*** `x-make-font-bold-italic' (`make-face-bold-italic')
3670*** `x-make-font-unbold' (`make-face-unbold')
3671*** `x-make-font-unitalic' (`make-face-unitalic')
3672*** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3673*** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3674*** `iswitchb-default-keybindings' (`iswitchb-mode')
3675*** `char-bytes' (== 1)
3676*** `isearch-return-char' (`isearch-printing-char')
3677*** `make-local-hook' (not needed)
3678*** `set-screen-height' (`set-frame-height')
3679*** `set-screen-width' (`set-frame-width')
3680
3681** The following obsolete variables and varaliases have been removed
3682(the appropriate new variable is given in parentheses):
3683
3684*** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3685*** `vc-header-alist' (`vc-BACKEND-header')
3686*** `directory-sep-char' (== ?/)
3687*** `font-lock-defaults-alist' (`font-lock-defaults')
3688*** `e' (`float-e').
3689
3690** The following obsolete files were removed:
3691sc.el, x-menu.el, rnews.el, rnewspost.el
3692
3693** The format of the finder-inf.el file has changed, since the Finder
3694mechanism is now based on the package system. The variable
3695`finder-package-info' is replaced by `package--builtins' and
3696`finder-keywords-hash'.
3697
3698** When generating autoloads, `update-directory-autoloads' no longer
3699assumes every inspected file is in your `load-path'. It instead
3700generates relative names according to the current `load-path'.
3701
3702
3703* Lisp Changes in Emacs 24.1
3704
3705** Code can now use lexical scoping by default instead of dynamic scoping.
3706The `lexical-binding' variable enables lexical scoping for local
3707variables. It is typically set via a file-local variable in the first
3708line of the file, in which case it applies to all the code in that
3709file.
3710
3711*** `eval' takes a new optional argument `lexical' to choose the new lexical
3712binding instead of the old dynamic binding mode.
3713
3714*** Lexically scoped interpreted functions are represented with a new form
3715of function value which looks like (closure ENV ARGS &rest BODY).
3716
3717*** New macro `letrec' to define recursive local functions.
3718
3719*** `defvar' and `defconst' now mark the variable as special (dynamic).
3720So do `defcustom' and other forms that call `defvar' as a subroutine.
3721
3722*** New function `special-variable-p' to check whether a variable is
3723declared as dynamically bound.
3724
3725*** The form ((lambda ...) ...) is deprecated.
3726
3727** An Emacs Lisp testing tool is now included.
3728Emacs Lisp developers can use this tool to write automated tests for
3729their code. See the ERT info manual for details.
3730
3731** Changes for bidirectional display and editing
3732
3733*** New function `current-bidi-paragraph-direction'.
3734This returns the base direction of the paragraph at point.
3735
3736*** New function `bidi-string-mark-left-to-right'.
3737Given a string containing characters from right-to-left scripts, this
3738function returns another string which can be safely inserted into a
3739buffer, such that any following text will be always displayed to the
3740right of that string. (This works by appending an invisible Unicode
3741"LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3742
3743This is useful when the buffer has overall left-to-right paragraph
3744direction and you need to insert a string whose contents are not known
3745in advance, without disrupting the layout of the line.
3746
3747** Window changes
3748
3749*** Window tree functions are accessible in Elisp.
3750Functions are provided to return the parent, siblings or child windows
3751of any window including internal windows (windows not associated with a
3752buffer) in the window tree.
3753
3754**** New function `window-valid-p' gives non-nil for live and internal
3755windows.
3756
3757**** Window manipulation can deal with internal windows.
3758Many window handling functions like `split-window', `delete-window', or
3759`delete-other-windows' as well as the window resizing functions can now
3760act on any window including internal ones.
3761
3762*** window-total-height/-width vs window-body-height/-width.
3763The function `window-height' has been renamed to `window-total-height'
3764and `window-width' has been renamed to `window-body-width'. The old
3765names are provided as aliases. Two new functions `window-total-width'
3766and `window-body-height' are provided.
3767
3768*** Window parameters specific to window handling functions.
3769For each window you can specify a parameter to override the default
3770behavior of a number of functions like `split-window', `delete-window'
3771and `delete-other-windows'. The variable `ignore-window-parameters'
3772allows to ignore processing such parameters.
3773
3774*** New semantics of third argument of `split-window'.
3775The third argument of `split-window' has been renamed to SIDE and can be
3776set to any of the values 'below, 'right, 'above, or 'left to make the
3777new window appear on the corresponding side of the window that shall be
3778split. Any other value of SIDE will cause `split-window' to split the
3779window into two side-by-side windows as before.
3780
3781*** Window resizing functions.
3782A new standard function for resizing windows called `window-resize' has
3783been introduced. This and all other functions for resizing windows no
3784longer delete any windows when they become too small.
3785
3786*** Deleting the selected window now selects the most recently selected
3787live window on that frame instead.
3788
3789*** `adjust-window-trailing-edge' adjustments.
3790`adjust-window-trailing-edge' can now deal with fixed-size windows and
3791is able to resize other windows if a window adjacent to the trailing
3792edge cannot be shrunk any more. This makes its behavior more similar to
3793that of Emacs 21 without compromising, however, its inability to delete
3794windows which was introduced in Emacs 22.
3795
3796*** Window-local buffer lists.
3797Windows now have local buffer lists. This means that removing a buffer
3798from display in a window will preferably show the buffer previously
3799shown in that window with its previous window-start and window-point
3800positions. This also means that the same buffer may be automatically
3801shown twice even if it already appears in another window.
3802
3803*** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3804which if non-nil requires the buffer to be displayed in the currently
3805selected window, signaling an error otherwise. If nil, another window
3806can be used, e.g. if the selected one is strongly dedicated.
3807
3808*** `split-window-vertically' and `split-window-horizontally' renamed
3809to `split-window-below' and `split-window-right' respectively.
3810The old names are kept as aliases.
3811
3812*** Display actions
3813
3814**** The second arg to `display-buffer' and `pop-to-buffer' is now
3815named ACTION, and takes a display action of the same form as
3816`display-buffer-base-action' (see Changes, above). A non-nil,
3817non-list value is treated specially, as the old meaning.
3818
3819**** New variable `display-buffer-overriding-action'.
3820
3821**** The procedure of `display-buffer' etc. to choose a window is
3822determined by combining `display-buffer-overriding-action',
3823`display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3824and `display-buffer-fallback-action'. The second and fourth of these
3825are user-customizable variables.
3826
3827See the docstring of `display-buffer' for details.
3828
3829*** New functions `window-state-get' and `window-state-put'.
3830These functions allow to save and restore the state of an arbitrary
3831frame or window as an Elisp object.
3832
3833** Completion
3834
3835*** New variable `completion-extra-properties' used to specify extra
3836properties of the current completion:
3837- :annotate-function, same as the old completion-annotate-function.
3838- :exit-function, function to call after completion took place.
3839
3840*** Functions on `completion-at-point-functions' can return any of the
3841properties valid for `completion-extra-properties'.
3842
3843*** `completion-annotate-function' is obsolete.
3844
3845*** New `metadata' method for completion tables. The metadata thus returned
3846can specify various details of the data returned by `all-completions':
3847- `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3848 used to select a style in completion-category-overrides.
3849- `annotation-function' to add annotations in *Completions*.
3850- `display-sort-function' to specify how to sort entries in *Completions*.
3851- `cycle-sort-function' to specify how to sort entries when cycling.
3852
3853*** `minibuffer-local-filename-must-match-map' is not used any more.
3854Instead, the bindings in `minibuffer-local-filename-completion-map'
3855are combined with `minibuffer-local-must-match-map'.
3856
3857*** New variable `completing-read-function' allows overriding the
3858behavior of `completing-read'.
3859
3860** `glyphless-char-display' can now distinguish between graphical and
3861text terminal display, via a char-table entry that is a cons cell.
3862
3863** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3864Instead, the offending function is removed.
3865
3866** New hook types
3867
3868*** New function `run-hook-wrapped' for running an abnormal hook by
3869passing the hook functions as arguments to a "wrapping" function.
3870Like `run-hook-with-args-until-success', it stops at the first
3871non-nil return value.
3872
3873*** New macro `with-wrapper-hook' for running an abnormal hook as a
3874set of "wrapping" filters, similar to around advice.
3875(A version of this macro was actually added in Emacs 23.2 but was not
3876advertised at the time.)
3877
3878** Debugger changes
3879
3880*** New macro `condition-case-unless-debug' (this was actually added in
3881Emacs 23.1 as condition-case-no-debug, but not advertised)
3882
3883*** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3884
3885*** Variable `stack-trace-on-error' removed.
3886
3887*** The debugger can now "continue" from an error, which means it will
3888jump to the error handler as if the debugger had not been invoked
3889instead of jumping all the way to the top-level.
3890
3891*** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3892This can be useful when `inhibit-quit' is set.
3893
3894** The new function `server-eval-at' allows evaluation of Lisp forms on
3895named Emacs server instances.
3896
3897** `call-process' and `call-process-region' allow a `(:file "file")' spec
3898to redirect STDOUT to a file.
3899
3900** The function `format-time-string' now supports the %N directive,
3901for higher-resolution time stamps.
3902
3903** New input reading functions
3904
3905*** New function `read-char-choice' reads a restricted set of
3906characters, discarding any inputs not inside the set.
3907
3908*** The command `read-color' now requires a match for a color name
3909or RGB triplet, instead of signaling an error if the user provides
3910invalid input.
3911
3912**** `facemenu-read-color' is now an alias for `read-color'.
3913
3914** `image-library-alist' is renamed to `dynamic-library-alist'.
3915The variable is now used to load all kind of supported dynamic libraries,
3916not just image libraries. The previous name is still available as an
3917obsolete alias.
3918
3919** Syntax parsing changes
3920
3921*** New variable `syntax-propertize-function'.
3922This replaces `font-lock-syntactic-keywords' which is now obsolete.
3923This allows syntax-table properties to be set independently from font-lock:
3924just call syntax-propertize to make sure the text is propertized.
3925Together with this new variable come a new hook
3926syntax-propertize-extend-region-functions, as well as two helper functions:
3927syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3928as-is; and syntax-propertize-rules which provides a new way to specify
3929syntactic rules.
3930
3931*** Syntax tables support a new "comment style c" additionally to style b.
3932
3933** New hook `post-self-insert-hook', run after `self-insert-command'.
3934
3935** frame-local variables cannot be let-bound any more.
3936
3937** Major and minor mode changes
3938
3939*** `set-auto-mode' now respects mode: local variables at the end of files,
3940as well as those in the -*- line.
3941
3942*** `prog-mode' is a new major mode from which programming modes
3943should be derived.
3944
3945**** `prog-mode-hook' can be used to enable features for programming
3946modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3947on-the-fly spell checking for comments and strings.
3948
3949*** New hook `change-major-mode-after-body-hook', run by
3950`run-mode-hooks' just before any other mode hooks.
3951
3952*** Enabled globalized minor modes can be disabled in specific major modes.
3953If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3954major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3955
3956*** `define-minor-mode' accepts new keywords :variable, :after-hook.
3957
3958** File-handling changes
3959
3960*** `delete-file' and `delete-directory' now accept optional arg TRASH.
3961Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3962both non-nil. Interactively, TRASH defaults to t, unless a prefix
3963argument is supplied (see Trash changes, above).
3964
3965*** New file predicates: `file-equal-p', `file-in-directory-p'.
3966
3967** Tool-bars can display separators.
3968Tool-bar separators are handled like menu separators in menu-bar maps,
3969i.e. via menu entries of the form `(menu-item "--")'.
3970
3971** Image API
3972
3973*** Animated images support (currently animated gifs only).
3974
3975**** `image-animated-p' returns non-nil if an image can be animated.
3976
3977**** `image-animate' animates a supplied image spec.
3978
3979**** `image-animate-timer' returns the timer object for an image that
3980is being animated.
3981
3982*** `image-extension-data' has been renamed to `image-metadata'.
3983The old name is an obsolete alias to the new one.
3984
3985*** Image mode can view any image type that ImageMagick supports.
3986This requires Emacs to be built with ImageMagick support.
3987
3988**** New function `imagemagick-types', defined if ImageMagick support
3989is enabled, returns a list of image file extensions that your
3990ImageMagick installation supports.
3991
3992**** New function `imagemagick-register-types' enables ImageMagick
3993image types in Image mode and in `create-image' and other helper
3994functions.
3995
3996**** New option `imagemagick-types-inhibit' excludes certain
3997ImageMagick image types from `imagemagick-register-types'.
3998
3999**** With ImageMagick support, there are extra Image mode commands to
4000resize and rotate images: `image-transform-fit-to-height',
4001`image-transform-fit-to-width', `image-transform-set-rotation', and
4002`image-transform-set-scale'.
4003
4004** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
4005passes it to the mail user agent function. This argument specifies an
4006action for returning to the caller after finishing with the mail. For
4007example, this is used by Rmail to optionally delete a mail window.
4008
4009** XML and HTML parsing
4010If Emacs is compiled with libxml2 support, there are two new
4011functions: `libxml-parse-html-region' (which parses "real world" HTML)
4012and `libxml-parse-xml-region' (which parses XML). Both return an
4013Emacs Lisp parse tree.
4014
4015** Networking and encryption changes
4016
4017*** `open-network-stream' can now be used to open an encrypted stream.
4018It now accepts an optional `:type' parameter for initiating a TLS
4019connection, directly or via STARTTLS. To do STARTTLS, additional
4020parameters (`:end-of-command', `:success', `:capabilities-command')
4021must also be supplied.
4022
4023*** New library gnutls.el.
4024The new function `gnutls-available-p' returns non-nil if Emacs is
4025built with GnuTLS support. The main entry points are
4026`open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
4027these functions through `open-network-stream', because that can
4028upgrade connections through STARTTLS opportunistically or use plain
4029SSL, depending on your needs. For debugging, set `gnutls-log-level'
4030greater than 0.
4031
4032*** New primitive `secure-hash' that supports many secure hash algorithms:
4033md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
4034sha1.el has been removed. The `sha1' feature is provided by default.
4035
4036** Isearch
4037
4038*** New hook `isearch-update-post-hook' that runs in `isearch-update'.
4039
4040** Progress reporters can now "spin".
4041The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
4042now be nil, or omitted. This makes a "non-numeric" reporter. Each
4043time you call `progress-reporter-update' on that progress reporter,
4044with a nil or omitted VALUE argument, the reporter message is
4045displayed with a "spinning bar".
4046
4047** New variable `revert-buffer-in-progress-p' is true while a buffer is
4048being reverted, even if the buffer has a local `revert-buffer-function'.
4049
4050** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
4051If delayed-warnings-list is non-nil, the command loop calls
4052`delayed-warnings-hook' after `post-command-hook'. At present, this
4053is only used by Emacs on some platforms to display warnings during
4054startup, which might otherwise not be noticed. This uses the
4055functions `display-delayed-warnings' and `collapse-delayed-warnings'.
4056
4057** rx.el has a new `group-n' construct for explicitly numbered groups.
4058
4059** New function `make-composed-keymap' that constructs a new keymap
4060from multiple input maps. You can use this to make a keymap that
4061inherits from multiple maps, eg:
4062 (set-keymap-parent newmap (make-composed-keymap othermap parent))
4063
4064** New function `string-prefix-p'.
4065(This was actually added in Emacs 23.2 but was not advertised at the time.)
4066
4067** New reader macro ## that stands for the empty symbol.
4068This means that the empty symbol can now be read back. Also, #: by itself
4069(when not immediately followed by a possible symbol character) stands for
4070an empty uninterned symbol.
4071
4072** New math functions `isnan', `copysign', `frexp', `ldexp'.
4073
4074** The following functions and variables are obsolete:
4075
4076*** `tooltip-use-echo-area' is obsolete.
4077Rather than setting this to t, disable Tooltip mode instead.
4078
4079*** buffer-substring-filters is obsolete.
4080Use `filter-buffer-substring-functions' instead.
4081
4082*** `byte-compile-disable-print-circle' is obsolete.
4083
4084*** `deferred-action-list' and `deferred-action-function' are obsolete.
4085Use `post-command-hook' instead.
4086
4087*** `font-lock-maximum-size' is obsolete.
4088
4089
4090* Changes in Emacs 24.1 on Non-Free Operating Systems
4091
4092** On MS Windows, Emacs warns when using the obsolete init file _emacs,
4093and also when HOME is set to C:\ by default.
4094
4095** New configure.bat options
4096
4097*** --enable-checking builds Emacs with extra runtime checks.
4098
4099*** --distfiles specifies files to be included in binary distribution.
4100
4101*** --without-gnutls disables automatic GnuTLS detection.
4102
4103*** --lib for general library linkage, works with the USER_LIBS build variable.
4104
4105** New make target `dist' to create binary distribution for MS Windows.
4106
4107** The Lisp function `w32-default-color-map' is now obsolete.
4108(It is only used internally in the Emacs C code.)
4109
4110** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
4111reappear on mouse-over. (Requires OS X 10.6 or later.)
4112
4113** On Mac OS X, dragging a file into Emacs visits the file, like on
4114other platforms, rather than inserting its contents into the buffer.
4115 334
4116 335
4117---------------------------------------------------------------------- 336----------------------------------------------------------------------
diff --git a/etc/NEWS.24 b/etc/NEWS.24
new file mode 100644
index 00000000000..eba9b940585
--- /dev/null
+++ b/etc/NEWS.24
@@ -0,0 +1,3822 @@
1GNU Emacs NEWS -- history of user-visible changes.
2
3Copyright (C) 2010-2014 Free Software Foundation, Inc.
4See the end of the file for license conditions.
5
6Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
7If possible, use M-x report-emacs-bug.
8
9This file is about changes in Emacs version 24.
10
11See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
12and NEWS.1-17 for changes in older Emacs versions.
13
14You can narrow news to a specific version by calling `view-emacs-news'
15with a prefix argument or by typing C-u C-h C-n.
16
17
18* Installation Changes in Emacs 24.4
19
20** Emacs can now be compiled with ACL (access control list) support.
21This happens by default if a suitable support library is found at
22build time, like libacl on GNU/Linux. To prevent this, use the
23configure option `--disable-acl'. See below for the features this provides.
24
25** Emacs can now be compiled with file notification support.
26This happens by default if a suitable system library is found at
27build time. To prevent this, use the configure option
28`--without-file-notification'. See below for file-notify features.
29This feature is not available for the Nextstep port.
30
31** Emacs can now be compiled with zlib support.
32This happens by default if zlib is present, which it normally is.
33To prevent this, use the configure option `--without-zlib'.
34This provides the function `zlib-decompress-region'; see below for details.
35
36** The configure option `--without-compress-info' has been generalized,
37and renamed to `--without-compress-install'. It now prevents compression
38of _any_ files during installation.
39
40** The configure option `--with-crt-dir' has been removed.
41It is no longer needed, as the crt*.o files are no longer linked specially.
42
43** Directories passed to configure option `--enable-locallisppath' are
44no longer created during installation.
45
46** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
47This requires pkg-config to be available at build time.
48
49
50* Startup Changes in Emacs 24.4
51
52** When initializing `load-path', an empty element in the EMACSLOADPATH
53environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
54"/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
55load-path (the one that would have been used if EMACSLOADPATH was unset).
56This makes it easier to _extend_ the load-path via EMACSLOADPATH
57(previously, EMACSLOADPATH had to specify the complete load-path,
58including the defaults). (In older versions of Emacs, an empty element
59was replaced by ".", so use an explicit "." now if that is what you want.)
60
61** The -L option, which normally prepends its argument to load-path,
62will instead append, if the argument begins with `:' (or `;' on MS Windows;
63i.e., `path-separator').
64
65** If you use either site-load.el or site-init.el to customize the dumped
66Emacs executable, any changes to `load-path' that these files make
67will no longer be present after dumping. To affect a permanent change
68to `load-path', use the `--enable-locallisppath' option of `configure'.
69
70** The user option `initial-buffer-choice' can now specify a function
71to set up the initial buffer.
72
73
74* Changes in Emacs 24.4
75
76** Support for ACLs (access control lists).
77This requires a suitable support library to be found at build time.
78On GNU/Linux, the POSIX ACL interface is used via libacl.
79On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
80ACLs are extended file attributes, used e.g. for finer-grained permissions.
81
82*** Emacs preserves the ACL entries of files when backing up.
83
84*** New functions `file-acl' and `set-file-acl' get and set file ACLs.
85
86** Support for menus on text-mode terminals.
87If the terminal supports a mouse, clicking on the menu bar, or on
88sensitive portions of the mode line or header line, will drop down the
89menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
90C-mouse-3 on the text area will pop up the menus defined for those locations.
91
92If the text terminal does not support a mouse, you can activate the
93first menu-bar menu by typing F10, which invokes `menu-bar-open'.
94
95If you want the previous behavior, where F10 invoked `tmm-menubar',
96customize the option `tty-menu-open-use-tmm' to a non-nil value.
97(Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
98is nil.)
99
100** New option `load-prefer-newer' affects how the `load' function chooses
101the file to load. If this is non-nil, then when both .el and .elc
102versions of a file exist, and the caller did not explicitly specify
103which one to load, then the newer file is loaded. The default, nil,
104means to always load the .elc file.
105
106** Multi-monitor support
107
108*** New functions `display-monitor-attributes-list' and
109`frame-monitor-attributes' can be used to obtain information about
110each physical monitor on multi-monitor setups.
111
112*** The functions `display-pixel-width' and `display-pixel-height' now
113behave consistently among the platforms: they return the pixel width
114or height for all physical monitors associated with the given display
115as if they were on X. To get information for each physical
116monitor, use the new functions above. Similar notes also apply to
117`x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
118`display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
119
120** New function `zlib-decompress-region', which decompresses gzip- and
121zlib-format compressed data using built-in zlib support (if available).
122
123** The *Messages* buffer is created in `messages-buffer-mode',
124a new major mode, with read-only status. Any code that might create
125the *Messages* buffer should call the function `messages-buffer' to do
126so and set up the mode.
127
128** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
129You can change the default by customizing `blink-cursor-blinks'.
130
131** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
132This affects View mode, etc.
133
134** The default value of `make-backup-file-name-function' is no longer nil.
135Instead it defaults to a function that does what the nil value used to.
136
137** Help
138
139*** The command `apropos-variable' is renamed to `apropos-user-option'.
140`apropos-user-option' shows all user options, while `apropos-variable'
141shows all variables. When called with a universal prefix argument,
142the two commands swap their behaviors. When `apropos-do-all' is
143non-nil, they output the same results.
144
145*** The key `?' now describes prefix bindings, like `C-h'.
146
147*** The command `describe-function' has been extended for EIEIO.
148Running it on constructors will show a full description of the
149generated class. For generic functions, it will show all
150implementations together with links to the source. The old commands
151`describe-class', `describe-constructor' and `describe-generic' were
152removed.
153
154*** The function `quail-help' is no longer an interactive command.
155Use `C-h C-\' (`describe-input-method') instead.
156
157** Frame and window handling
158
159*** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
160bound to <f11> and M-<f10>, respectively.
161
162*** New hooks `focus-in-hook', `focus-out-hook'.
163These are normal hooks run when an Emacs frame gains or loses input focus.
164
165*** The function `window-in-direction' now takes additional arguments
166for specifying a reference point, wrapping the selection around frame
167borders, and specifying ways to select the minibuffer window.
168
169*** Emacs can now change frame sizes in units of pixels, rather than
170text rows or columns. When maximizing a frame or making it fullscreen,
171remaining extra pixels are no longer given to the minibuffer, the rightmost
172fringe, or other unusable space, but are distributed among the text
173areas of the frame's windows. If the new option `frame-resize-pixelwise'
174is non-nil, all frame size changes happen pixelwise and set the
175corresponding size hints for the window manager.
176
177*** Emacs can now change window sizes in units of pixels.
178Mouse-dragging a mode line or window divider now changes the size of
179adjacent windows pixelwise. If the new option `window-resize-pixelwise'
180is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
181resize windows pixelwise. Most functions for changing or accessing
182window sizes now have an additional argument that allows changes to apply,
183or values to be returned, in pixels instead of lines/columns.
184
185*** The functions `window-body-height' and `window-body-width' now never
186count partially visible lines or columns if called with a nil PIXELWISE
187argument.
188
189*** Emacs can now draw dividers between adjacent windows. To put
190dividers between side-by-side/vertically stacked windows customize the
191frame parameters `right-divider-width' and `bottom-divider-width' to
192some positive integer. You can drag dividers with the mouse (they show
193a corresponding cursor when the mouse hovers over them). You can change
194the appearance of dividers by customizing the faces `window-divider',
195`window-divider-first-pixel', and `window-divider-last-pixel'. The last
196two are useful to provide a 3D effect, or to better distinguish dividers
197from surrounding display objects.
198
199*** New functions to return the pixel sizes of window components, namely
200`window-scroll-bar-width', `window-mode-line-height',
201`window-header-line-height', `window-right-divider-width', and
202`window-bottom-divider-width'.
203
204*** The new function `window-text-pixel-size' returns the size of the
205text of a window's buffer in pixels. This allows functions like
206`fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
207window to its buffer as it will be displayed.
208
209*** `fit-window-to-buffer' can now resize windows in both dimensions.
210This behavior is controlled by the new option
211`fit-window-to-buffer-horizontally'. The new option
212`fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
213
214*** `fit-frame-to-buffer' now fits frames in both dimensions. The new
215options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
216control the size of the frame and its position on screen.
217
218*** Temp Buffer Resize Mode can now adjust the height and width of
219windows and frames. The new option `temp-buffer-max-width' allows you to
220control the width of temporary buffer windows. Moreover, if the new
221option `fit-frame-to-buffer' is non-nil and the buffer appears in the
222root window of a frame, Temp Buffer Resize Mode will try to adjust the
223width and/or height of the frame.
224
225*** `split-window' is now a non-interactive function, not a command.
226As a command, it was a special case of `C-x 2' (`split-window-below'),
227and as such superfluous. After being reimplemented in Lisp, its
228interactive form was mistakenly retained.
229
230*** The functions `window-size' and `window-total-size' now have an
231optional argument to return a rounded size value.
232
233*** `window-state-put' now allows you to put a window state into internal
234windows too.
235
236*** New option `scroll-bar-adjust-thumb-portion'.
237Available only on X, this option allows you to control over-scrolling
238using the scroll bar (i.e., dragging the thumb down even when the end
239of the buffer is visible).
240
241*** New display actions functions for `display-buffer':
242
243**** `display-buffer-at-bottom' chooses or creates a window at the
244bottom of the selected frame.
245
246**** `display-buffer-no-window' to not display the buffer in a window.
247
248*** New display action alist entry `allow-no-window' to indicate the
249caller of `display-buffer' is ready to handle the case of not displaying
250the buffer in a window.
251
252*** `display-buffer-in-previous-window' is now a member of
253`display-buffer-fallback-action'.
254
255** Lisp evaluation
256
257*** `eval-defun' on an already defined defcustom calls the :set function,
258if there is one.
259
260*** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
261and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
262zero prefix argument. This disables truncation of lists in the output,
263equivalent to setting `(eval-expression-)print-length' and
264`(eval-expression-)print-level' to nil. Additionally, it causes integers
265to be printed in other formats (octal, hexadecimal, and character).
266
267*** New hook `eval-expression-minibuffer-setup-hook' run by
268`eval-expression' on entering the minibuffer.
269
270** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
271because it affects caching of paragraph scanning results as well.
272There is no reason to set this to nil except for debugging purposes.
273
274** `emacs-bzr-version' has been renamed to `emacs-repository-version',
275and works for git too, if you fetch the repository notes.
276
277** The default value of `comment-use-global-state' is now t,
278and this variable has been marked obsolete.
279
280** `write-region-inhibit-fsync' now defaults to t in batch mode.
281
282** The option `set-mark-default-inactive' has been deleted.
283This unfinished feature was introduced by accident in Emacs 23.1;
284simply disabling Transient Mark mode does the same thing.
285
286
287* Editing Changes in Emacs 24.4
288
289** Indentation
290
291*** `electric-indent-mode' is now enabled by default.
292Typing RET reindents the current line and indents the new line.
293`C-j' inserts a newline but does not indent. In some programming modes,
294additional characters are electric (eg `{').
295
296*** New buffer-local `electric-indent-local-mode'.
297
298*** The behavior of `C-x TAB' (`indent-rigidly') has changed.
299When invoked without a prefix argument, it now activates a transient
300mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
301the text indentation in the region. Typing any other key resumes
302normal editing behavior.
303
304*** `tab-stop-list' is now implicitly extended to infinity by repeating
305the last step. Its default value is changed to nil, which means a tab
306stop every `tab-width' columns.
307
308** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
309In other words, if you visit two files that have the same base name,
310then rather than creating buffers basename and basename<2>,
311Emacs uses basename<dirA> and basename<dirB>. To change this,
312customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
313
314** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
315Most commands are still unaware of it, but kill/yank do work on the rectangle.
316
317** New option `visual-order-cursor-movement'.
318If this is non-nil, cursor motion with arrow keys will follow the
319visual order of characters on the screen: <left> always moves to the
320left, <right> always moves to the right, disregarding the surrounding
321bidirectional context.
322
323** New command `delete-duplicate-lines'.
324This searches the region for identical lines, and removes all but one
325copy of each repeated line. The lines need not be sorted.
326
327** New command `cycle-spacing' acts like a smarter `just-one-space'.
328When called in succession, it cycles between spacing conventions:
329one space, no spaces, original spacing.
330
331** `blink-matching-paren' now only highlights the matching open-paren
332by default, instead of moving the cursor. Set this variable to `jump' to
333restore the old behavior.
334
335** The new function `fill-single-char-nobreak-p' can stop fill from breaking
336a line after a one-letter word, which is an error in some typographical
337conventions. To use it, add it to the `fill-nobreak-predicate' hook.
338
339** Registers
340
341*** All interactive commands that read a register (`copy-to-register', etc.)
342now display a temporary window after `register-preview-delay' seconds
343that summarizes existing registers. To disable this, set that option to nil.
344Interactive commands that read registers and want to make use of this
345should use `register-read-with-preview' to read register names.
346
347*** New command `frameset-to-register' bound to `C-x r f', replacing
348`frame-configuration-to-register'. It offers similar functionality,
349plus enhancements like the ability to restore deleted frames.
350(`frame-configuration-to-register' still exists, but no longer has a
351key binding.)
352
353*** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
354macros in registers.
355
356
357* Changes in Specialized Modes and Packages in Emacs 24.4
358
359** Backtrace and debugger
360
361*** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
362display of local variables of the current stack frame.
363
364*** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
365the lexical environment when evaluating the code in the context at point
366(and so allows you to access lexical variables).
367
368*** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
369
370** Battery information can now be retrieved from BSD's `apm' utility.
371
372** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
373
374** Calc
375
376*** Calc by default now uses the Gregorian calendar for all dates, and
377uses January 1, 1 AD as its day number 1. Previously Calc used the
378Julian calendar for dates before September 14, 1752, and it used
379December 31, 1 BC as its day number 1; the new scheme is more
380consistent with Calendar's calendrical system and day numbering.
381
382*** The new option `calc-gregorian-switch' lets you configure if
383(and when) Calc switches from the Julian to the Gregorian calendar.
384
385*** Support for ISO 8601 dates.
386
387** Calendar and Diary
388
389*** New faces `calendar-weekday-header', `calendar-weekend-header',
390and `calendar-month-header'.
391
392*** New option `calendar-day-header-array'.
393
394*** New variable `diary-from-outlook-function', used by the command
395`diary-from-outlook'.
396
397*** The variable `calendar-font-lock-keywords' is obsolete.
398
399** CEDET
400
401*** EDE
402
403**** The cpp-root project now supports executing a compile command.
404It can be set through the new :compile-command slot or the
405buffer-local variable `compile-command'.
406
407**** Better selection of include directories for the 'linux' project.
408Include directories now support out-of-tree build directories and
409target architecture auto-detection.
410
411*** Semantic
412
413**** Improved detection of used namespaces in current scope in C++.
414
415**** Parsing of default values for variables and function arguments in C/C++.
416They are also displayed by the summarize feature in the mode line.
417
418**** Improved parsing of function pointers in C/C++.
419This also includes parsing of function pointers as function arguments.
420
421**** Parsing of C/C++ preprocessor macros that open new scope.
422For example, this enables parsing of macros that open new namespaces.
423
424**** Support for 'this' pointer in inline member functions in C++.
425
426** CFEngine mode
427
428*** Support for completion, ElDoc, and Flycheck has been added.
429
430*** The current CFEngine syntax is parsed from "cf-promises -s json".
431There is a fallback syntax available if you don't have cf-promises or
432if your version doesn't support that option. See option `cfengine-cf-promises'.
433
434** cl-lib
435
436*** New macro `cl-tagbody'.
437This executes statements while allowing for control transfer to labels.
438
439*** letf is now just an alias for cl-letf.
440
441** CUA mode
442
443*** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
444Hence, you can now enable it independently from those modes, and from
445`transient-mark-mode'.
446
447*** `cua-highlight-region-shift-only' is now obsolete.
448You can disable `transient-mark-mode' to get the same result.
449
450*** CUA's rectangles can now be used without CUA by calling the command
451`cua-rectangle-mark-mode'.
452
453** Delete Selection mode can now be used without Transient Mark mode.
454
455** Desktop
456
457*** `desktop-save-mode' by default now auto-saves an existing desktop file
458after `desktop-auto-save-timeout'. To disable this, customize that option
459to nil (or zero).
460
461*** Desktop now saves and restores the frame/window configuration.
462To disable this, set `desktop-restore-frames' to nil.
463See also related options `desktop-restore-reuses-frames',
464`desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
465
466** New Dired minor mode `dired-hide-details-mode' toggles whether details,
467such as file ownership or permissions, are visible in Dired buffers.
468See the new options `dired-hide-details-hide-symlink-targets' and
469`dired-hide-details-hide-information-lines' for customizing what to hide.
470
471** You can enable ElDoc inside the `eval-expression' minibuffer with:
472 (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
473The results display in the mode line.
474
475** Electric Pair mode
476
477*** New option `electric-pair-preserve-balance', enabled by default.
478If non-nil, pairing/skipping only kicks in when that help the balance
479of parentheses and quotes; i.e., the buffer should end up at least as
480balanced as before.
481
482You can further control this behavior by adjusting the predicates
483stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
484
485*** New option `electric-pair-delete-adjacent-pairs', enabled by default.
486In `electric-pair-mode', the commands `backward-delete-char' and
487`backward-delete-char-untabify' are now bound to electric variants
488that delete the closer when invoked between adjacent pairs.
489
490*** New option `electric-pair-open-newline-between-pairs', enabled by default.
491In `electric-pair-mode', inserting a newline between adjacent pairs
492opens an extra newline after point, which is indented if
493`electric-indent-mode' is also set.
494
495*** New option `electric-pair-skip-whitespace', enabled by default.
496This controls if skipping over closing delimiters should jump over any
497whitespace slack. Setting it to `chomp' makes it delete this
498whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
499
500*** New variables control the pairing in strings and comments.
501You can customize `electric-pair-text-pairs' and
502`electric-pair-text-syntax-table' to tweak pairing behavior inside
503strings and comments.
504
505** New EPA option `epa-mail-aliases'.
506You can set this to a list of email address aliases that `epa-mail-encrypt'
507should use to find keys.
508
509** New ERC option `erc-accidental-paste-threshold-seconds'.
510If set to a number, this can be used to avoid accidentally pasting large
511amounts of data into the ERC input.
512
513** New ERT macro `skip-unless' allows skipping ERT tests.
514
515** Eshell
516
517*** `eshell' now supports visual subcommands and options.
518Eshell has been able to handle "visual" commands (interactive,
519non-line oriented commands such as top that require display
520capabilities not provided by eshell) by running them in an Emacs
521terminal emulator. See `eshell-visual-commands'.
522
523This feature has been extended to subcommands and options that make a
524usually line-oriented command a visual command. Typical examples are
525"git log" and "git <command> --help", which display their output in a
526pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
527
528*** New Eshell-Tramp module.
529External su and sudo commands are now the default; the internal,
530Tramp-using variants can still be used by enabling the eshell-tramp module.
531
532** New F90 mode option `f90-smart-end-names'.
533
534** New option `gnutls-verify-error', if non-nil, means that Emacs
535should reject SSL/TLS certificates that GnuTLS determines as invalid.
536(This option defaults to nil at present, but this is expected to change
537in a future release.)
538
539** Hi-Lock
540
541*** New global command `M-s h .' (`highlight-symbol-at-point') highlights
542the symbol near point.
543
544*** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
545will cycle through faces in `hi-lock-face-defaults' without prompting.
546
547** Icomplete is now more similar to Ido.
548
549*** Icomplete by default now applies to all forms of minibuffer completion.
550The variable `icomplete-with-completion-tables' (now a user option)
551controls this. To restore the old behavior, set it back to
552'(internal-complete-buffer).
553
554*** You can navigate through and select completions using the keys
555from `icomplete-minibuffer-map'.
556
557*** The string that separates potential completions is now a customizable
558option (`icomplete-separator'). The default is " | " rather than ",".
559
560*** New face `icomplete-first-match'; and new options
561`icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
562
563*** The option `icomplete-show-key-bindings' has been removed.
564
565** Ido
566
567*** An Ido user manual is now included.
568
569*** The option `ido-use-virtual-buffers' can now take the value `auto'.
570This means to use virtual buffers if the current ido input does not match
571an existing buffer.
572
573*** The variable `ido-decorations' can optionally have two new elements,
574which are the brackets to use around the sole remaining completion.
575
576** Image mode
577
578*** New commands `n' (`image-next-file') and `p' (`image-previous-file')
579visit the next image file and the previous image file in the same
580directory, respectively.
581
582*** New commands to show specific frames of multi-frame images.
583`f' (`image-next-frame') and `b' (`image-previous-frame') visit the
584next or previous frame. `F' (`image-goto-frame') shows a specific frame.
585
586*** New commands to speed up, slow down, or reverse animation.
587`a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
588speed up and slow down the animation. `a r' (`image-reverse-speed')
589to reverse it and `a 0' (`image-reset-speed') to reset it.
590
591*** The command `image-mode-fit-frame' deletes other windows.
592When toggling, it restores the frame's previous window configuration.
593It also has an optional frame argument, which can be used by Lisp
594callers to fit the image to a frame other than the selected frame.
595
596** New Imenu option `imenu-generic-skip-comments-and-strings'.
597
598** Info
599
600*** New Info face `info-index-match', used to highlight matches in index
601entries displayed by `Info-index-next', `Info-virtual-index' and
602`info-apropos'.
603
604*** The Info-edit command is obsolete. Editing Info nodes by hand
605has not been relevant for some time.
606
607** JS Mode
608
609*** New option `js-switch-indent-offset'.
610
611*** Better indentation of multiple-variable declarations.
612If a declaration spans several lines, variables on the following lines
613are lined up to the first one.
614
615*** Recognition and better indentation of continuations in array comprehensions.
616
617** MH-E has been updated to version 8.6 - see separate MH-E-NEWS file.
618
619** Octave mode
620
621*** Font locking for Texinfo comments and new keywords.
622
623*** Completion in Octave file buffers.
624
625*** ElDoc support.
626
627*** Jump to definition.
628
629*** Documentation lookup/search.
630
631** OPascal mode is the new name for Delphi mode
632
633*** All delphi-* variables and functions have been renamed to opascal-*.
634Obsolete aliases exist for those likely to have been used externally.
635
636*** The option `delphi-newline-always-indents' has been removed.
637Use `electric-indent-mode' instead.
638
639*** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
640
641** Package
642
643*** The package library now supports digital signing of packages.
644Maintainers of package archives should consider signing their packages
645to enhance security.
646
647**** If the user option `package-check-signature' is non-nil,
648Emacs tries to check package signatures at install time.
649The value `allow-unsigned' allows installation of unsigned packages.
650
651**** The user option `package-unsigned-archives' lists archives where
652Emacs will not try to check signatures.
653
654*** New option `package-pinned-packages'. This is useful if you have multiple
655archives enabled, with more than one offering a given package that you want.
656
657*** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
658to filter the list of packages by a keyword.
659
660*** In the `describe-package' buffer, there are now buttons listing the
661keywords related to the package. Click on a button to see other packages
662related to that keyword.
663
664*** The format of `archive-contents' files, generated by package
665repositories, has changed to allow a new (fifth) element in the data
666vectors, containing an associative list with extra properties.
667(For example, `describe-package' uses the `:url' extra property to
668display a "Homepage" header.)
669
670** In Prolog mode, `prolog-use-smie' has been removed,
671along with the non-SMIE indentation code.
672
673** Python mode
674
675*** Out of the box support for CPython, iPython and readline based shells.
676**** `python-shell-completion-module-string-code' is no longer used.
677
678*** Automatic shell prompt detection. New user options:
679**** `python-shell-interpreter-interactive-arg'.
680**** `python-shell-prompt-detect-enabled'.
681**** `python-shell-prompt-detect-failure-warning'.
682**** `python-shell-prompt-input-regexps'.
683**** `python-shell-prompt-output-regexps'.
684
685*** Python shell support for remote hosts via tramp.
686
687*** Correct display of line numbers for code sent to the Python shell.
688
689** Remember
690
691*** The new command `remember-notes' creates a buffer that is saved on exit.
692You can use it as a more permanent *scratch* buffer.
693
694*** Remember can now store notes in separate files.
695To use this, add `remember-store-in-files' to the `remember-handler-functions'
696option. The files are saved in `remember-data-directory' using
697names specified by `remember-directory-file-name-format'.
698
699** Rmail
700
701*** Customize `rmail-mbox-format' to influence some minor aspects of
702how Rmail displays non-MIME messages.
703
704*** The `unrmail' command now converts from BABYL to mboxrd format,
705rather than mboxo. Customize `unrmail-mbox-format' to change this.
706
707** Ruby mode
708
709*** Improved syntax highlighting and indentation.
710
711*** New `electric-indent-mode' integration.
712
713*** New option `ruby-encoding-magic-comment-style'.
714
715*** New option `ruby-custom-encoding-magic-comment-template'.
716
717*** New option `ruby-align-to-stmt-keywords'.
718
719*** New option `ruby-align-chained-calls'.
720
721*** More Ruby file types have been added to `auto-mode-alist'.
722
723** Search and Replace
724
725*** New global command `M-s .' (`isearch-forward-symbol-at-point')
726starts a symbol (identifier) incremental search forward with the
727symbol found near point added to the search string initially.
728
729*** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
730and adds it to the search string.
731
732*** `M-s i' in Isearch mode toggles whether search matches invisible text.
733
734*** `query-replace' skips invisible text when `search-invisible' is nil,
735and opens overlays with hidden text when `search-invisible' is `open'.
736
737*** A negative prefix argument of replacement commands replaces backward.
738`M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
739backward, `M-s w words M-- M-%' replaces a sequence of words backward.
740
741*** By default, prefix arguments do not now terminate Isearch mode.
742Set `isearch-allow-prefix' to nil to restore the old behavior.
743
744*** More Isearch commands accept prefix arguments, namely
745`isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
746`isearch-yank-line'.
747
748*** Word search now matches whitespace at the beginning/end
749of the search string if it contains leading/trailing whitespace.
750In an incremental word search or when using a non-nil LAX argument
751of `word-search-regexp', the lax matching can also match part of
752the first word (in addition to the lax matching of the last word).
753The same rules are now applied to the symbol search, with the difference
754that it matches symbols, and non-symbol characters between symbols.
755
756** New SES command `ses-rename-cell' allows assignment of names to SES cells.
757
758** The shell.el option `explicit-bash-args' includes --noediting by default.
759All non-ancient Bash versions support this option.
760
761** Shell Script mode
762
763*** The SMIE indentation engine is now used by default - see `sh-use-smie'.
764
765*** `sh-mode' now has its own setting for `add-log-current-defun-function'.
766
767** SMIE
768
769*** You can customize the SMIE indentation of a mode via `smie-config'.
770The command `smie-config-guess' can help you derive the appropriate
771indentation settings, if you provide it with an indented sample file.
772Use `smie-config-save' to save the result.
773
774*** You can customize the SMIE indentation of a file by adding an entry to
775the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
776
777*** New commands `smie-config-show-indent' and `smie-config-set-indent'.
778
779** SQL mode
780
781*** Improved login monitoring and appropriate response to login failures.
782New variable `sql-login-delay' defines maximum wait time for a connection.
783
784*** Oracle support.
785SQL*Plus script placeholders are properly highlighted and identified
786in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
787are passed before the logon parameter, as required. The default now
788includes `-L', to limit the number of logon attempts per invocation.
789
790** New Term mode option `term-suppress-hard-newline'.
791
792** Todo mode has been rewritten and enhanced.
793The Todo mode user manual describes all commands and most user
794options. To support some of these features, a new file format is
795used, which is incompatible with the old format; however, you can
796convert old todo and done item files to the new format on initializing
797the first new todo file, or at any later time with the provided
798conversion command. The previous version of todo-mode.el has been
799renamed to otodo-mode.el and is now obsolete. New features include:
800
801*** Support for multiple todo files and archive files of done items.
802
803*** Renaming, reordering, moving, merging, and deleting categories.
804
805*** Sortable tabular summaries of categories and the item types they contain.
806
807*** Cross-category lists of items filtered by specific criteria.
808
809*** More fine-grained interaction with the Emacs diary, by being able to
810decide for each todo item whether it appears in the Fancy Diary display.
811
812*** Highly flexible new item insertion and item editing.
813
814*** Moving items between categories, storing done items in their category
815or in archive files, undoing or unarchiving done items.
816
817*** Reprioritizing items by inputting a numerical priority.
818
819*** Extensive customizability of operation and display, including many faces.
820
821** Trace
822
823*** `trace-function' and `trace-function-background' no longer prompt for
824the output buffer. Unless you use a prefix argument, they output to
825`trace-buffer'.
826
827*** With a prefix argument, `trace-function' and `trace-function-background'
828will prompt for a "context". This is a Lisp expression, whose value at the
829time the function is entered/exited is printed along with the function's
830name and arguments.
831
832** Tramp
833
834*** New connection method "adb", which allows to access Android
835devices by the Android Debug Bridge. The variable `tramp-adb-program'
836can be used to adapt the path of the "adb" program, if needed.
837
838*** Handlers for `file-acl' and `set-file-acl' for remote machines
839that support POSIX ACLs.
840
841*** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
842for remote machines that support filesystem notifications.
843
844*** The experimental url syntax for remote file names has been removed.
845
846*** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
847"scpc" and "rsyncc" are discontinued. The ssh option
848"ControlMaster=auto" is set automatically in all ssh-based methods,
849when possible. See `tramp-use-ssh-controlmaster-options'.
850
851** New URL command `url-cookie-list' displays the current cookies,
852and allows you to interactively remove cookies.
853
854** VC and related modes
855
856*** In VC directory mode, `D' displays diffs between VC-controlled
857whole tree revisions.
858
859*** In VC directory mode, `L' lists the change log for the current VC
860controlled tree in a window.
861
862*** In VC directory mode, `I' shows a log of changes that will be
863received with a pull operation.
864
865*** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
866under current version control system. When called with a prefix
867argument, you can remove a file from the ignored file list.
868
869** VHDL mode
870
871*** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
872
873*** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
874
875** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
876are obsolete. Customize the `woman-*' faces instead.
877
878** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
879Affected files:
880~/.emacs.d/timelog replaces ~/.timelog
881~/.emacs.d/vip replaces ~/.vip
882~/.emacs.d/viper replaces ~/.viper
883~/.emacs.d/ido.last replaces ~/.ido.last
884~/.emacs.d/kkcrc replaces ~/.kkcrc
885~/.emacs.d/quickurls replaces ~/.quickurls
886~/.emacs.d/idlwave/ replaces ~/.idlwave/
887~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
888~/.emacs.d/places replaces ~/.emacs-places
889~/.emacs.d/shadows replaces ~/.shadows
890~/.emacs.d/shadow_todo replaces ~/.shadow_todo
891~/.emacs.d/strokes replaces ~/.strokes
892~/.emacs.d/notes replaces ~/.notes
893~/.emacs.d/type-break replaces ~/.type-break
894Also the following files used by the now obsolete otodo-mode.el:
895~/.emacs.d/todo-do replaces ~/.todo-do
896~/.emacs.d/todo-done replaces ~/.todo-done
897~/.emacs.d/todo-top replaces ~/.todo-top
898
899** Obsolete packages
900
901*** iswitchb.el; use icomplete-mode.
902
903*** longlines.el; use visual-line-mode.
904
905*** meese.el.
906
907*** sup-mouse.el.
908
909*** terminal.el; use term.el instead.
910
911*** the old version of todo-mode.el (renamed to otodo-mode.el).
912
913*** xesam.el (owing to the cancellation of the XESAM project).
914
915*** yow.el; use fortune.el or cookie1.el instead.
916
917
918* New Modes and Packages in Emacs 24.4
919
920** New package eww.el provides a built-in web browser.
921This requires Emacs to have been compiled with libxml2 support.
922
923** New package nadvice.el offers lighter-weight advice facilities.
924It is layered as:
925
926*** `add-function'/`remove-function', which can be used to add/remove code on
927any function-carrying place, such as process filters or `<foo>-function' hooks.
928
929*** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
930function, much like `defadvice' does.
931
932** New package frameset.el provides a set of operations to save a frameset
933(the state of all or a subset of the existing frames and windows, somewhat
934similar to a frame configuration), both in-session and persistently, and
935restore it at some point in the future.
936
937** New package filenotify.el provides an interface for file system
938notifications. It requires that Emacs be compiled with one of the
939low-level libraries gfilenotify.c, inotify.c or w32notify.c.
940
941** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
942display specified symbols as composed characters. E.g., in Emacs Lisp mode,
943this replaces the string "lambda" with the Greek lambda character.
944
945** New minor mode `superword-mode', which overrides the default word motion
946commands to treat "symbol_words" as a single word, similar to what
947`subword-mode' does.
948
949
950* Incompatible Lisp Changes in Emacs 24.4
951
952** The default file coding for Emacs Lisp files is now utf-8.
953(See `file-coding-system-alist'.) In most cases, this change is
954transparent, but files that contain unusual characters without
955specifying an explicit coding system may fail to load with obscure
956errors. You should either convert them to utf-8 or add an explicit
957`coding:' cookie.
958
959** Default process filters and sentinels are not nil any more.
960Instead they default to a function that does what the nil value used to do.
961
962** Overlay priority does not have to be nil or a non-negative integer.
963Overlay priority can be other kinds of Lisp objects. We didn't yet
964decide whether other types of values are stable enough, and therefore
965don't feel it's right to document them. For now, don't assume in your
966code that the values of overlay priority can only be either nil or an
967integer, always test them with an appropriate predicate to be one or
968the other. If you need to sort arbitrary overlays into priority
969order, `overlays-at' can now optionally do this.
970You should still only specify integer priorities on overlays you create.
971
972** The cars of the elements in `interpreter-mode-alist' are now
973treated as regexps rather than literal strings.
974
975** `overriding-terminal-local-map' no longer replaces the local keymaps.
976It used to disable the minor mode, major mode, and text-property keymaps,
977whereas now it simply has higher precedence.
978
979** `kill-region' has lost its `yank-handler' optional argument.
980
981** `(input-pending-p)' no longer runs other timers that are ready to run.
982The new optional CHECK-TIMERS parameter allows for the prior behavior.
983
984** `defvar' and `defcustom' in a let-binding affect the "external" default.
985
986** The syntax of ?» and ?« is now punctuation instead of matched parens.
987Some languages match those as »...«, and others as «...», so it is
988better for Emacs to stay neutral by default.
989
990** `read-event' does not always decode chars in ttys any more. As was the case
991in Emacs 22 and before, `read-event' (and `read-char') by default read raw
992bytes from the terminal. If you want to read decoded chars instead (as was
993always the case in Emacs-23, for example), pass a non-nil
994`inherit-input-method' argument.
995
996** In `symbol-function', nil and "unbound" are indistinguishable.
997`symbol-function' does not signal a `void-function' error any more.
998To determine if a symbol's function definition is void, use `fboundp'.
999
1000** `defadvice' does not honor the `freeze' flag and cannot advise
1001special-forms any more.
1002
1003** `dolist' no longer binds VAR while evaluating the RESULT form,
1004when lexical binding is enabled. Previously, VAR was bound to nil,
1005which often led to spurious unused-variable warnings.
1006
1007** The return value of `backup-buffer' has changed.
1008The second argument is no longer an SELinux context, instead it is an
1009alist of extended attributes as returned by the new function
1010`file-extended-attributes'. The attributes can be applied to another
1011file using `set-file-extended-attributes'.
1012
1013** By default `copy-file' no longer copies file permission bits to an
1014existing destination; and it sets the file permission bits of a newly
1015created destination to those of the source, masked by the default file
1016permissions. To copy the file permission bits, pass t as the
1017PRESERVE-PERMISSIONS argument of `copy-file'.
1018
1019** `visited-file-modtime' now returns -1 for nonexistent files.
1020Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
1021in the presence of files with negative time stamps.
1022
1023** Frame-local variables that affect redisplay do not work any more.
1024More specifically, redisplay does not bother to check for a frame-local
1025value when looking up variables.
1026
1027** In compiled Lisp files, the header no longer includes a timestamp.
1028
1029** The option `inhibit-local-menu-bar-menus' has been removed.
1030
1031
1032* Lisp Changes in Emacs 24.4
1033
1034** Change to the Emacs Lisp coding conventions: the package descriptor
1035and name of global variables, constants, and functions should be separated
1036by two hyphens if the symbol is not meant to be used by other packages.
1037
1038** The second argument of `eval' can now specify a lexical environment.
1039
1040** New macro `define-alternatives' can be used to define generic commands.
1041Generic commands are interactive functions whose implementation can be
1042selected among several alternatives, as a matter of user preference.
1043
1044** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
1045
1046** New functions `special-form-p' and `macrop'.
1047
1048** New macro `with-eval-after-load'.
1049This is like the old `eval-after-load', but better behaved.
1050
1051** If you give a symbol a `defalias-fset-function' property, `defalias'
1052on that symbol will use the associated value as a function to call
1053in place of `fset'.
1054
1055** New variable `enable-dir-local-variables'.
1056Directory-local variables are ignored if this is nil. This may be
1057useful for modes that want to ignore directory-locals while still
1058respecting file-local variables.
1059
1060** `read-regexp' now uses the new variable `read-regexp-defaults-function'
1061as a function to call to provide default values.
1062
1063** New functions `group-gid' and `group-real-gid'.
1064
1065** New function `get-pos-property'.
1066
1067** New hook `pre-redisplay-function'.
1068
1069** `byte-compile-interactive-only-functions' is now obsolete.
1070To specify that a command should only be called interactively, give it
1071a non-nil `interactive-only' property.
1072
1073** New function `string-suffix-p'.
1074
1075** `split-string' now takes an optional argument TRIM.
1076The value, if non-nil, is a regexp that specifies what to trim from
1077the start and end of each substring.
1078
1079** Completion
1080
1081*** The separator used by `completing-read-multiple' is now a regexp.
1082The default `crm-separator' has been changed to allow surrounding spaces
1083around the comma.
1084
1085*** New function `completion-table-with-cache' is a wrapper for
1086`completion-table-dynamic' that caches the result of the last lookup.
1087
1088*** New function `completion-table-merge' to combine several
1089completion tables by merging their completions.
1090
1091*** The `common-substring' argument of `display-completion-list',
1092which has been documented as obsolete since Emacs 23.1, is now _really_
1093obsolete, and no longer advertised. Instead either call
1094`completion-hilit-commonality' to add the highlighting; or use
1095`completion-all-completions', which returns highlighted strings.
1096
1097** Encoding and decoding of text
1098
1099*** New coding-system `prefer-utf-8'.
1100This is like `undecided' but prefers UTF-8 on decoding if the text to
1101be decoded does not contain any invalid UTF-8 sequences. On encoding,
1102any non-ASCII characters are automatically encoded as UTF-8.
1103
1104*** New attributes of coding-systems whose type is `undecided'.
1105Two new attributes, `:inhibit-null-byte-detection' and
1106`:inhibit-iso-escape-detection', determine how to detect encoding of
1107text that includes null bytes and ISO-2022 escape sequences, respectively.
1108Each of these attributes can be either nil, zero, or t. If t, decoding
1109text ignores null bytes and ISO-2022 sequences, respectively. If nil,
1110null bytes cause text to be decoded with no-conversion, and ISO-2022
1111sequences cause Emacs to assume the text is encoded in one of the ISO-2022
1112encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
1113`inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
1114The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
1115UTF-8 encoding and decoding, whenever possible.
1116
1117These attributes are only meaningful for coding-systems of type `undecided'.
1118(The type of a coding-system is determined by its `:coding-type' attribute
1119and can be accessed by calling the `coding-system-type' function.)
1120
1121** Error-handling
1122
1123*** New function `define-error'.
1124
1125*** `with-demoted-errors' takes an additional argument `format'.
1126
1127*** Errors from timer functions are no longer silently discarded,
1128but are reported as messages. So you may see "Error running timer"
1129messages from code that was failing silently till now. Set
1130`debug-on-error' non-nil to get a real error and a backtrace.
1131
1132** Faces
1133
1134*** Face specs set via Custom themes now replace the `defface' spec
1135rather than inheriting from it. In other words, setting a face via a
1136theme now behaves like setting it via Customize: you only need to
1137specify the attributes that you want, you don't need to unset those
1138that you don't want.
1139
1140*** The function `face-spec-set' is now like `setq' for face specs.
1141Its third arg now accepts values specifying a face spec type (defface,
1142custom, or override spec), and the relevant spec is set accordingly.
1143
1144*** New face spec attribute :distant-foreground
1145specifies foreground to use if background color is near the foreground
1146color that would otherwise have been used.
1147
1148*** New function `add-face-text-property', which can be used to
1149conveniently prepend/append new face properties.
1150
1151*** New face characteristic (supports :underline (:style wave))
1152specifies whether or not the terminal can display a wavy line.
1153
1154** File-handling
1155
1156*** Support for filesystem notifications.
1157Emacs now supports notifications of filesystem changes, such as
1158creation, modification, and deletion of files. This requires the
1159`glib' API, or the 'inotify' API (on GNU/Linux systems only). On
1160MS-Windows systems, this is supported for Windows XP and newer.
1161
1162*** The 9th element returned by `file-attributes' is now unspecified.
1163Formerly, it was t if the file's gid would change if file were deleted
1164and recreated. This value has been inaccurate for years on many
1165platforms, and nobody seems to have noticed or cared.
1166
1167*** The 6th argument to `copy-file' has been renamed to
1168PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
1169Unix file permission bits as well as SELinux context.
1170
1171*** The function `file-ownership-preserved-p' now has an optional
1172argument GROUP which causes it check for file group too. This can be
1173used in place of the 9th element of `file-attributes'.
1174
1175*** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
1176with the same interpretation as the returned value of `visited-file-modtime'.
1177
1178** Image API
1179
1180*** `image-animated-p' is now `image-multi-frame-p'.
1181It returns non-nil for any image that contains multiple frames,
1182whether or not it specifies a frame delay.
1183
1184*** New variable `image-default-frame-delay' gives the frame delay for
1185animated images which do not specify a frame delay.
1186
1187*** New functions `image-current-frame' and `image-show-frame' for getting
1188and setting the current frame of a multi-frame image.
1189
1190** ImageMagick
1191
1192*** ImageMagick images now support the :max-width and :max-height keywords.
1193
1194*** When using `create-image' with image data, you can pass a :format
1195attribute (via the property-list argument) in order to help
1196ImageMagick detect the image type. The value should be a MIME
1197content-type that is found in the new variable `image-format-suffixes'.
1198
1199** Revert and Autorevert
1200
1201*** If Emacs is compiled with file notification support, it uses notifications
1202instead of checking file time stamps. To disable this, set the user option
1203`auto-revert-use-notify' to nil. Alternatively, you can specify a regular
1204expression matching directories to be excluded from file notifications via
1205`auto-revert-notify-exclude-dir-regexp'.
1206
1207*** The default values of `buffer-stale-function', `revert-buffer-function',
1208and `revert-buffer-insert-file-contents-function' are no longer nil.
1209Instead they default to functions that do what the nil value used to.
1210
1211*** `buffer-stale-function' is now used for buffers visiting files too.
1212
1213*** The new user option `auto-revert-remote-files' enables reversion
1214of remote files, if non-nil.
1215
1216** Terminal
1217
1218*** Functions to pop up menus and dialogs now work on all terminals,
1219including TTYs. This includes `x-popup-menu', `x-popup-dialog',
1220`message-box', `yes-or-no-p', etc.
1221
1222The function `display-popup-menus-p' will now return non-nil for a
1223display or frame whenever a mouse is supported on that display or frame.
1224
1225*** New hook `tty-setup-hook', run at the end of initializing a text terminal.
1226
1227*** The hook `term-setup-hook' is obsolete. It is entirely equivalent
1228to `emacs-startup-hook'. See also the new `tty-setup-hook'.
1229
1230** Minor internal changes to the details of lock files.
1231The lock for DIR/FILE is now _always_ DIR/.#FILE.
1232If DIR/.#FILE already exists and is not an Emacs lock file,
1233Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
1234numbered lock files DIR/.#FILE.0...).
1235On file systems that do not support symbolic links, the lock is now a
1236regular file with contents being what would have been in the symlink.
1237
1238** New bool-vector set operation functions:
1239*** `bool-vector-exclusive-or'
1240*** `bool-vector-union'
1241*** `bool-vector-intersection'
1242*** `bool-vector-set-difference'
1243*** `bool-vector-not'
1244*** `bool-vector-subsetp'
1245*** `bool-vector-count-consecutive'
1246*** `bool-vector-count-population'
1247
1248** New library subr-x.el with miscellaneous small utility functions:
1249*** `hash-table-keys'
1250*** `hash-table-values'
1251*** `string-blank-p'
1252*** `string-empty-p'
1253*** `string-join'
1254*** `string-reverse'
1255*** `string-trim-left'
1256*** `string-trim-right'
1257*** `string-trim'
1258*** `string-remove-prefix'
1259*** `string-remove-suffix'
1260
1261** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
1262
1263** The spelling of the rx.el category `chinese-two-byte' has been
1264corrected (the first 'e' was missing).
1265
1266** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
1267*** object-name -> eieio-object-name
1268*** object-class -> eieio-object-class
1269*** object-class-fast -> eieio--object-class
1270*** object-class-name -> eieio-object-class-name
1271*** object-name-string -> eieio-object-name-string
1272*** object-num-slots -> eieio--object-num-slots
1273*** object-set-name-string -> eieio-object-set-name-string
1274*** class-of -> eieio-object-class
1275*** class-name -> eieio-class-name
1276*** class-parent -> eieio-class-parent
1277*** class-parents -> eieio-class-parents
1278*** class-parents-fast -> eieio-class-parents-fast
1279*** class-children -> eieio-class-children
1280*** class-num-slots -> eieio--class-num-slots
1281*** class-precedence-list -> eieio-class-precedence-list
1282*** class-direct-subclasses -> eieio-class-children
1283*** class-direct-superclasses -> eieio-class-parents
1284
1285** Obsoleted functions
1286*** `log10'
1287*** `dont-compile'
1288*** `lisp-complete-symbol'
1289*** `field-complete'
1290*** `minibuffer-completion-contents'
1291*** `isearch-nonincremental-exit-minibuffer'
1292*** `isearch-filter-visible'
1293*** `generic-make-keywords-list'
1294*** `get-upcase-table' (use `case-table-get-table' instead).
1295
1296** `with-wrapper-hook' is obsoleted by `add-function'.
1297The few hooks that used with-wrapper-hook are replaced as follows:
1298*** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
1299*** `completion-in-region-function' obsoletes `completion-in-region-functions'.
1300*** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
1301
1302
1303* Changes in Emacs 24.4 on Non-Free Operating Systems
1304
1305** New Core Text based font backend for Mac OS X 10.5 and newer.
1306To use the old font backend, use the following on the command line:
1307 % defaults write org.gnu.Emacs FontBackend ns
1308GNUstep and Mac OS X 10.4 use the old font backend.
1309
1310** Improved fullscreen support on Mac OS X 10.7 and newer, where the
1311default fullscreen method is now "native" fullscreen. To use the
1312old style fullscreen, customize `ns-use-native-fullscreen' to nil.
1313
1314** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
1315by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
1316Note that this does not apply to images.
1317
1318** The procedure for building Emacs on MS-Windows has changed.
1319It is now built by running the same configure script as on all other
1320platforms. This requires the MSYS environment and MinGW development
1321tools. See the updated instructions in nt/INSTALL for details.
1322
1323Using the Posix configure script and Makefiles also means a change in
1324the directory structure of the Emacs installation on Windows. It is
1325now the same as on GNU and Unix systems. In particular, the auxiliary
1326programs, such as cmdproxy.exe and hexl.exe, are in
1327libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
1328version), version-independent site-lisp is in share/emacs/site-lisp,
1329version-specific Lisp files are in share/emacs/VERSION/lisp and in
1330share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
1331files are in share/emacs/VERSION/etc. (Emacs knows about all these
1332directories and will find the files in there automatically; there's no
1333need to set any variables due to this change.)
1334
1335** Emacs on Windows 2000 and later can now access files and directories
1336whose names cannot be encoded in the current system codepage.
1337
1338The new variable `w32-unicode-filenames' controls this feature: if it
1339is t, Emacs uses Unicode APIs to pass file names to system calls,
1340which lifts the limitation of file names to the current locale.
1341
1342** Lock files now work on MS-Windows.
1343This helps to prevent losing your edits if the same file is being
1344edited in another Emacs session or by another user. See the node
1345"Interlocking" in the Emacs User Manual for the details. To disable
1346file locking, customize `create-lockfiles' to nil.
1347
1348** The "generate a backtrace on fatal error" feature now works on MS-Windows.
1349The backtrace is written to the 'emacs_backtrace.txt' file in the
1350directory where Emacs was running.
1351
1352** The `network-interface-list' and `network-interface-info' functions
1353are now available on MS-Windows.
1354
1355** The variable `buffer-file-type' is no longer supported.
1356Setting it has no effect, and %t in the mode-line format is ignored.
1357Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
1358modifying it has no effect.
1359
1360
1361* Installation Changes in Emacs 24.3
1362
1363** The default X toolkit is now Gtk+ version 3.
1364If you don't pass `--with-x-toolkit' to configure, or if you use
1365`--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
1366to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
1367You can explicitly require a specific version by passing
1368`--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
1369
1370** New configure option `--enable-link-time-optimization', to utilize
1371an appropriate feature provided by GCC since version 4.5.0.
1372
1373** New configure option `--without-all' to disable most of the optional
1374features (image support, etc.) that are normally enabled by default.
1375
1376** New configure option `--enable-gcc-warnings' (for developing/debugging
1377Emacs). If building with GCC, this enables compile-time checks that
1378warn/give errors about possibly-questionable C code. On a recent GNU
1379system there should be no warnings; on older and on non-GNU systems
1380the results may be useful to developers.
1381
1382** The configure option `--enable-use-lisp-union-type' has been
1383renamed to `--enable-check-lisp-object-type', as the resulting
1384Lisp_Object type no longer uses a union to implement the compile time
1385check that this option enables.
1386
1387** The configure option `--disable-maintainer-mode' has been removed,
1388as it was confusingly-named and rarely useful.
1389
1390** The configure options `--program-prefix', `--program-suffix', and
1391`--program-transform-name' apply to more than just the installed
1392binaries. Now they also affect the man pages, icons, and the
1393etc/emacs.desktop file; but not the info pages, since this would break
1394links between the various manuals.
1395
1396** You can use `NO_BIN_LINK=t make install' to prevent the installation
1397overwriting "emacs" in the installation bin/ directory with a link
1398to "emacs-VERSION".
1399
1400** Emacs uses libtinfo in preference to libncurses, if available.
1401
1402** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
1403/usr/pkg/lib to the linker search path. You must add them yourself if
1404you want them.
1405
1406** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
1407(from the bin and libexec directories, respectively). The former is
1408no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
1409
1410
1411* Startup Changes in Emacs 24.3
1412
1413** Emacs no longer searches for `leim-list.el' files beneath the standard
1414lisp/ directory. There should not be any there anyway. If you have
1415been adding them there, put them somewhere else; e.g., site-lisp.
1416
1417** The `--no-site-lisp' command line option now works for Nextstep builds.
1418
1419
1420* Changes in Emacs 24.3
1421
1422** Help
1423
1424*** `C-h f' (`describe-function') can now perform autoloading.
1425When this command is called for an autoloaded function whose docstring
1426contains a key substitution construct, that function's library is
1427automatically loaded, so that the documentation can be shown
1428correctly. To disable this, set `help-enable-auto-load' to nil.
1429
1430*** `C-h f' now reports previously-autoloaded functions as "autoloaded",
1431even after their associated libraries have been loaded (and the
1432autoloads have been redefined as functions).
1433
1434** ImageMagick
1435
1436*** Images displayed via ImageMagick now support transparency and the
1437:background image specification property.
1438
1439*** When available, ImageMagick support is automatically enabled.
1440It is no longer necessary to call `imagemagick-register-types'
1441explicitly to install ImageMagick image types; that function is called
1442automatically at startup, or when customizing an imagemagick- option.
1443
1444*** Setting `imagemagick-types-inhibit' to t now disables the use of
1445ImageMagick to view images. (You must call `imagemagick-register-types'
1446afterwards if you do not use customize to change this.)
1447
1448*** The new variable `imagemagick-enabled-types' also affects which
1449ImageMagick types are treated as images. The function
1450`imagemagick-filter-types' returns the list of types that will be
1451treated as images.
1452
1453** Minibuffer
1454
1455*** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
1456next and previous path separator, respectively.
1457
1458*** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
1459in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
1460non-nil before enabling the mode.
1461
1462** Mode line
1463
1464*** New option `mode-line-default-help-echo' specifies the help text
1465(shown in a tooltip or in the echo area) for any part of the mode line
1466that does not have its own specialized help text.
1467
1468*** You can now click mouse-3 in the coding system indicator to invoke
1469`set-buffer-file-coding-system'.
1470
1471** Server and client
1472
1473*** emacsclient now obeys string values for `initial-buffer-choice',
1474if it is told to open a new frame without specifying any file to visit
1475or expression to evaluate.
1476
1477*** New option `server-auth-key' specifies a shared server key.
1478
1479** Emacs now generates backtraces on fatal errors.
1480On encountering a fatal error, Emacs now outputs a textual description
1481of the fatal signal, and a short backtrace on platforms like glibc
1482that support backtraces.
1483
1484** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
1485This minor mode replaces `toggle-read-only', which is now obsolete.
1486
1487** Most `y-or-n' prompts now allow you to scroll the selected window.
1488Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
1489respectively, without exiting from the prompt.
1490
1491** In the Package Menu, newly-available packages are listed as "new",
1492and sorted above the other "available" packages by default.
1493
1494** If your Emacs was built from a repository checkout, the new variable
1495`emacs-bzr-version' contains information about the bzr revision used.
1496
1497** New option `create-lockfiles' specifies usage of lockfiles.
1498It defaults to t. Changing it to nil inhibits the creation of lock
1499files (use this with caution).
1500
1501** New option `enable-remote-dir-locals', if non-nil, allows directory-local
1502variables on remote hosts.
1503
1504** The entry for PCL-CVS has been removed from the Tools menu.
1505The PCL-CVS commands are still available via the keyboard.
1506
1507** Using "unibyte: t" in Lisp source files is obsolete.
1508Use "coding: raw-text" instead.
1509
1510** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
1511has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
1512The previous binding, introduced in Emacs 24.1, was a mistake, because
1513`C-c LETTER' bindings are reserved for user customizations.
1514
1515** Internationalization
1516
1517*** New language environment: Persian.
1518
1519*** New input method `vietnamese-vni'.
1520
1521** Nextstep (GNUstep / Mac OS X) port
1522
1523*** Support for fullscreen and the frame parameter fullscreen.
1524
1525*** A file dialog is used for open/save operations initiated from the
1526menu/toolbar.
1527
1528
1529* Editing Changes in Emacs 24.3
1530
1531** Search and Replace
1532
1533*** Non-regexp Isearch now performs "lax" space matching.
1534Each sequence of spaces in the supplied search string may match any
1535sequence of one or more whitespace characters, as specified by the
1536variable `search-whitespace-regexp'. (This variable is also used by a
1537similar existing feature for regexp Isearch.)
1538
1539*** New Isearch command `M-s SPC' toggles lax space matching.
1540This applies to both ordinary and regexp Isearch.
1541
1542*** New option `replace-lax-whitespace'.
1543If non-nil, `query-replace' uses flexible whitespace matching too.
1544The default is nil.
1545
1546*** Global `M-s _' starts a symbol (identifier) incremental search,
1547and `M-s _' in Isearch toggles symbol search mode.
1548`M-s c' in Isearch toggles search case-sensitivity.
1549
1550** Navigation commands
1551
1552*** New binding `M-g c' for `goto-char'.
1553
1554*** New binding `M-g TAB' for `move-to-column'.
1555
1556*** `M-g TAB' (`move-to-column') prompts for a column number if called
1557interactively with no prefix arg. Previously, it moved to column 1.
1558
1559** New option `yank-handled-properties' allows processing of text
1560properties on yanked text, in ways that are more general than just
1561removing them (as is done by `yank-excluded-properties').
1562
1563** New option `delete-trailing-lines' specifies whether
1564M-x delete-trailing-whitespace should delete trailing lines at the end
1565of the buffer. It defaults to t.
1566
1567** `C-u M-=' now counts lines/words/characters in the entire buffer.
1568
1569** `C-x 8 RET' is now bound to `insert-char', which is now a command.
1570`ucs-insert' is now an obsolete alias for `insert-char'.
1571
1572** The `z' key no longer has a binding in most special modes.
1573It used to be bound to `kill-this-buffer', but `z' is too easy to
1574accidentally type.
1575
1576** New command `C-x r M-w' (`copy-rectangle-as-kill').
1577It copies the region-rectangle as the last rectangle kill.
1578
1579** Registers
1580
1581*** `C-x r +' is now overloaded to invoke `append-to-register'.
1582
1583*** New option `register-separator' specifies the register containing
1584the text to put between collected texts for use with
1585M-x append-to-register and M-x prepend-to-register.
1586
1587
1588* Changes in Specialized Modes and Packages in Emacs 24.3
1589
1590** Common Lisp emulation (CL)
1591
1592*** CL's main entry is now (require 'cl-lib).
1593`cl-lib' is like the old `cl' except that it uses the namespace cleanly;
1594i.e., all its definitions have the "cl-" prefix (and internal definitions
1595use the "cl--" prefix).
1596
1597If `cl' provided a feature under the name `foo', then `cl-lib'
1598provides it under the name `cl-foo' instead; with the exceptions of the
1599few `cl' definitions that had to use `foo*' to avoid conflicts with
1600pre-existing Elisp entities. These have been renamed to `cl-foo'
1601rather than `cl-foo*'.
1602
1603The old `cl' is now deprecated and is mainly just a bunch of aliases that
1604provide the old, non-prefixed names. Some exceptions are listed below:
1605
1606*** `cl-flet' is not like `flet' (which is deprecated).
1607Instead it obeys the behavior of Common-Lisp's `flet'.
1608In particular, in cl-flet function definitions are lexically scoped,
1609whereas in flet the scoping is dynamic.
1610
1611*** `cl-labels' is slightly different from `labels'.
1612The difference is that it relies on the `lexical-binding' machinery
1613(as opposed to the `lexical-let' machinery used previously) to capture
1614definitions in closures, so such closures will only work if `lexical-binding'
1615is in use.
1616
1617*** `cl-letf' is not exactly like `letf'.
1618The only difference is in details that relate to some deprecated usage
1619of `symbol-function' in place forms.
1620
1621*** `progv' was rewritten to use the `let' machinery.
1622A side effect is that variables without corresponding values are bound
1623to nil rather than being made unbound.
1624
1625*** The following methods of extending `setf' are obsolete
1626(use features from gv.el instead):
1627`define-modify-macro' (use `gv-letplace')
1628`defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
1629`define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
1630`get-setf-method' no longer exists (see "Incompatible Lisp Changes")
1631
1632** Diff mode
1633
1634*** Changes are now highlighted using the same color scheme as in
1635modern VCSes. Deletions are displayed in red (new faces
1636`diff-refine-removed' and `smerge-refined-removed', and new definition
1637of `diff-removed'), insertions in green (new faces `diff-refine-added'
1638and `smerge-refined-added', and new definition of `diff-added').
1639
1640*** The variable `diff-use-changed-face' defines whether to use the
1641face `diff-changed', or `diff-removed' and `diff-added' to highlight
1642changes in context diffs.
1643
1644*** The new command `diff-delete-trailing-whitespace' removes trailing
1645whitespace introduced by a diff.
1646
1647** Ediff now uses the same color scheme as Diff mode.
1648
1649** Python mode
1650
1651A new version of python.el, which provides several new features, including:
1652per-buffer shells, better indentation, Python 3 support, and improved
1653shell-interaction compatible with iPython (and virtually any other
1654text based shell).
1655
1656*** Some user options have been replaced/renamed, including (old -> new):
1657**** python-indent -> python-indent-offset
1658**** python-guess-indent -> python-indent-guess-indent-offset
1659**** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
1660**** python-use-skeletons -> python-skeleton-autoinsert
1661
1662*** Some user options have been removed, including:
1663
1664**** `python-indent-string-contents': Strings are never indented.
1665
1666**** `python-honour-comment-indentation':
1667Comments are always considered as indentation markers.
1668
1669**** `python-continuation-offset': Indentation is automatically
1670calculated in a pep8 compliant way depending on the context.
1671
1672**** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
1673Have no direct mapping as the shell interaction is completely different.
1674
1675**** `python-python-command', `python-jython-command':
1676Replaced by `python-shell-interpreter'.
1677
1678**** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
1679`python-pdbtrack-minor-mode-string', `python-source-modes':
1680No longer relevant.
1681
1682*** Some commands have been replaced (old -> new):
1683**** python-insert-class -> python-skeleton-class
1684**** python-insert-def -> python-skeleton-def
1685**** python-insert-for -> python-skeleton-for
1686**** python-insert-if -> python-skeleton-if
1687**** python-insert-try/except -> python-skeleton-try
1688**** python-insert-try/finally -> python-skeleton-try
1689**** python-insert-while -> python-skeleton-while
1690**** python-find-function -> python-nav-jump-to-defun
1691**** python-next-statement -> python-nav-forward-sentence
1692**** python-previous-statement -> python-nav-backward-sentence
1693**** python-beginning-of-defun-function -> python-nav-beginning-of-defun
1694**** python-end-of-defun-function -> python-nav-end-of-defun
1695**** python-send-buffer -> python-shell-send-buffer
1696**** python-send-defun -> python-shell-send-defun
1697**** python-send-region -> python-shell-send-region
1698**** python-send-region-and-go -> emulate with python-shell-send-region
1699and python-shell-switch-to-shell
1700**** python-send-string -> python-shell-send-string
1701**** python-switch-to-python -> python-shell-switch-to-shell
1702**** python-describe-symbol -> python-eldoc-at-point
1703
1704** D-Bus
1705
1706*** New variables `dbus-compiled-version' and `dbus-runtime-version'.
1707
1708*** The D-Bus object manager interface is implemented.
1709
1710*** Variables of type :(u)int32 and :(u)int64 accept floating points,
1711if their value does not fit into Emacs's integer range.
1712
1713*** The function `dbus-call-method' is now non-blocking.
1714It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
1715
1716*** Signals can also be sent as unicast messages.
1717
1718*** The argument list of `dbus-register-signal' has been extended,
1719according to the new match rule types of D-Bus.
1720
1721*** `dbus-init-bus' supports private connections.
1722
1723*** There is a new function `dbus-setenv'.
1724
1725** `desktop-path' no longer includes the "." directory.
1726Desktop files are now located in ~/.emacs.d by default.
1727
1728** Dired
1729
1730*** `dired-do-async-shell-command' executes each file sequentially
1731if the command ends in `;' (when operating on multiple files).
1732Otherwise, it executes the command on each file in parallel.
1733
1734*** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
1735`dired-do-chown', and `dired-do-touch' yanks the attributes of the
1736file at point.
1737
1738*** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
1739`DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
1740mark/unmark/flag all files in the active region.
1741
1742*** The minibuffer default for `=' (`dired-diff') has changed.
1743It is now the backup file for the file at point, if one exists.
1744In Transient Mark mode the default is the file at the active mark.
1745
1746*** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
1747The global binding for `M-=', `count-words-region' is in effect.
1748
1749** ERC
1750
1751*** New module "notifications", which can send a notification when you
1752receive a private message or your nickname is mentioned.
1753
1754*** ERC will look up server/channel names via auth-source and use any
1755channel keys found.
1756
1757*** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
1758only applies to messages sent by lurkers.
1759
1760** reStructuredText mode
1761
1762*** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
1763fontification, comment handling, and customization have all been revised
1764and improved.
1765
1766*** Support for `imenu' and `which-function-mode'.
1767
1768*** The reStructuredText syntax is more closely covered.
1769Sphinx support has been improved.
1770
1771*** `rst-insert-list' inserts new list or continues existing lists.
1772
1773*** A negative prefix argument always works for `rst-adjust'.
1774
1775*** The window configuration is reset after displaying a TOC.
1776
1777*** The constant `rst-version' describes the rst.el package version.
1778
1779** Ruby mode
1780
1781*** Support for percent literals and recognition of regular expressions
1782in method calls without parentheses with more methods, including Cucumber
1783steps definitions.
1784
1785*** Improved syntax highlighting and indentation.
1786
1787*** New command `ruby-toggle-block', bound to `C-c {'.
1788
1789*** Some non-standard keybindings/commands have been removed:
1790
1791**** `ruby-electric-brace'; use `electric-indent-mode' instead.
1792
1793**** `ruby-mark-defun'; use `mark-defun'.
1794
1795**** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
1796appropriate settings for the variables `beginning-of-defun-function'
1797and `end-of-defun-function'.
1798
1799**** Non-standard keybindings for `backward-kill-word', `comment-region',
1800`reindent-then-newline-and-indent' and `newline' have been removed.
1801
1802** Shell Script mode
1803
1804*** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
1805
1806*** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
1807
1808*** `sh-use-smie' lets you choose a new indentation and navigation code.
1809
1810** VHDL mode
1811
1812*** The free software compiler GHDL is supported (and now the default).
1813
1814*** Support for the VHDL-AMS packages has been added/updated.
1815
1816*** Updated to the 2002 revision of the VHDL standard.
1817
1818*** Accepts \r and \f as whitespace.
1819
1820** Apropos
1821
1822*** The faces used by Apropos are now directly customizable.
1823These faces are named `apropos-symbol', `apropos-keybinding', and so on;
1824see the `apropos' Custom group for details.
1825
1826*** The old options whose values specified faces to use have been removed
1827(i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
1828`apropos-match-face' and `apropos-property-face'.).
1829
1830** Buffer Menu
1831
1832*** This package has been rewritten to use Tabulated List mode.
1833
1834*** Option `Buffer-menu-buffer+size-width' is now obsolete.
1835Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
1836
1837** Calc
1838
1839*** Algebraic simplification mode is now the default.
1840To restrict to the limited simplifications given by the former
1841default simplification mode, use `m I'.
1842
1843** Calendar
1844
1845*** You can customize the header text that appears above each calendar month.
1846See the variable `calendar-month-header'.
1847
1848*** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
1849
1850*** The calendars produced by cal-html include holidays.
1851Customize `cal-html-holidays' to change this.
1852
1853** CEDET
1854
1855*** The major modes from the parser generators "Bovine" and "Wisent"
1856are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
1857are in `auto-mode-alist', and the corresponding manuals are included.
1858
1859*** EDE
1860
1861**** Menu support for the "Configuration" feature. This allows users to
1862choose the active configuration (such as debug or install) from the menu.
1863
1864**** New command `ede-set' to interactively set project-local variables.
1865
1866**** Support for compiling, debugging, and running in "generic" projects.
1867
1868**** Autoconf editing support for M4 macros with complex arguments.
1869
1870**** Compilation support for the "linux" project type.
1871
1872**** "simple" projects have been removed; use "generic" projects instead.
1873
1874*** Semantic
1875
1876**** Support for parsing #include statements inside a namespace in C/C++.
1877
1878**** Improved support for 'extern "C"' declarations in C/C++.
1879
1880**** The ability to ignore more common special C/C++ preprocessor symbols,
1881such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
1882If available, include cdefs.h as an additional source of preprocessor symbols.
1883
1884**** Improved C/C++ function pointer parsing.
1885
1886**** In Python, support for converting imports to include file names.
1887
1888**** Ability to dynamically determine the Python load path.
1889
1890**** Support for the Python 'WITH' and 'AT' keywords.
1891
1892**** Improved tooltip completion.
1893
1894*** SRecode
1895
1896**** The SRecode manual is now included.
1897
1898**** Tag generation supports constructor/destructor settings and system
1899include differentiation.
1900
1901**** Addition of 'Framework' support: Frameworks are specified when a
1902particular kind of library (such as Android) is needed in a common language
1903mode (like Java).
1904
1905**** Support for nested templates and let variables override based on priority.
1906
1907**** Support for merging tables from multiple related modes, such as
1908default -> c++ -> arduino.
1909
1910** Compile has a new option `compilation-always-kill'.
1911
1912** Customize
1913
1914*** `custom-reset-button-menu' now defaults to t.
1915
1916*** Non-option variables are never matched in `customize-apropos' and
1917`customize-apropos-options' (i.e., the prefix argument does nothing for
1918these commands now).
1919
1920** Term
1921
1922*** The variables `term-default-fg-color' and `term-default-bg-color'
1923are now deprecated in favor of the customizable face `term'.
1924
1925*** You can customize how to display ANSI terminal colors and styles
1926by customizing the corresponding `term-color-<COLOR>',
1927`term-color-underline' and `term-color-bold' faces.
1928
1929** Tramp
1930
1931*** The syntax has been extended in order to allow ad-hoc proxy definitions.
1932
1933*** Remote processes are now also supported on remote MS-Windows hosts.
1934
1935** URL
1936
1937*** Structs made by `url-generic-parse-url' have nil `attributes' slot.
1938Previously, this slot stored semicolon-separated attribute-value pairs
1939appended to some imap URLs, but this is not compatible with RFC 3986.
1940So now the `filename' slot stores the entire path and query components,
1941and the `attributes' slot is always nil.
1942
1943*** New function `url-encode-url' for encoding a URI string.
1944The `url-retrieve' function now uses this to encode its URL argument,
1945in case that is not properly encoded.
1946
1947** notifications.el supports now version 1.2 of the Notifications API.
1948The function `notifications-get-capabilities' returns the supported
1949server properties.
1950
1951** Flymake uses fringe bitmaps to indicate errors and warnings.
1952See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
1953`flymake-warning-bitmap'.
1954
1955** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
1956specifying URL types that should be converted to remote file names at
1957the FFAP prompt. The default is now '("ftp").
1958
1959** New Ibuffer `derived-mode' filter, bound to `/ M'.
1960The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
1961
1962** New option `mouse-avoidance-banish-position' specifies where the
1963`banish' mouse avoidance setting moves the mouse.
1964
1965** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
1966closing brackets to be aligned with the line of the opening bracket.
1967
1968** In Proced mode, new command `proced-renice' renices marked processes.
1969
1970** New option `async-shell-command-buffer' specifies the buffer to use
1971for a new asynchronous `shell-command' when the default output buffer
1972`*Async Shell Command*' is already in use.
1973
1974** SQL mode has a new option `sql-db2-escape-newlines'.
1975If non-nil, newlines sent to the command interpreter will be escaped
1976by a backslash. The default does not escape the newlines and assumes
1977that the sql statement will be terminated by a semicolon.
1978
1979** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
1980(and modes that derive from it), sorts the column at point, or the Nth
1981column if a numeric prefix argument is given.
1982
1983** `which-func-modes' now defaults to t, so Which Function mode, when
1984enabled, applies to all applicable major modes.
1985
1986** `winner-mode-hook' now runs when the mode is disabled, as well as when
1987it is enabled.
1988
1989** Follow mode no longer works by using advice.
1990The option `follow-intercept-processes' has been removed.
1991
1992** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
1993
1994** Hooks renamed to avoid obsolete "-hooks" suffix:
1995*** semantic-lex-reset-hooks -> semantic-lex-reset-functions
1996*** semantic-change-hooks -> semantic-change-functions
1997*** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
1998*** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
1999*** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
2000*** semanticdb-save-database-hooks -> semanticdb-save-database-functions
2001*** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
2002*** rcirc-sentinel-hooks -> rcirc-sentinel-functions
2003*** rcirc-receive-message-hooks -> rcirc-receive-message-functions
2004*** rcirc-activity-hooks -> rcirc-activity-functions
2005*** rcirc-print-hooks -> rcirc-print-functions
2006*** dbus-event-error-hooks -> dbus-event-error-functions
2007*** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
2008*** checkdoc-style-hooks -> checkdoc-style-functions
2009*** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
2010*** archive-extract-hooks -> archive-extract-hook
2011*** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
2012*** hfy-post-html-hooks -> hfy-post-html-hook
2013*** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
2014*** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
2015*** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
2016*** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
2017
2018** Obsolete packages
2019
2020*** assoc.el
2021In most cases, assoc+member+push+delq work just as well.
2022And in any case it's just a terrible package: ugly semantics, terrible
2023inefficiency, and not namespace-clean.
2024*** bruce.el
2025*** cust-print.el
2026*** ledit.el
2027*** mailpost.el
2028*** mouse-sel.el
2029*** patcomp.el
2030
2031
2032* Incompatible Lisp Changes in Emacs 24.3
2033
2034** Docstrings starting with `*' no longer indicate user options.
2035Only variables defined using `defcustom' are considered user options.
2036The function `user-variable-p' is now an obsolete alias for
2037`custom-variable-p'.
2038
2039** The return values of `defalias', `defun' and `defmacro' have changed,
2040and are now undefined. For backwards compatibility, `defun' and
2041`defmacro' currently return the name of the newly defined
2042function/macro, but this should not be relied upon.
2043
2044** `random' by default now returns a different random sequence in
2045every Emacs run. Use `(random S)', where S is a string, to set the
2046random seed to a value based on S, in order to get a repeatable
2047sequence in later calls.
2048
2049** If the NEWTEXT arg to `replace-match' contains a substring "\?",
2050that substring is inserted literally even if the LITERAL arg is
2051non-nil, instead of causing an error to be signaled.
2052
2053** `select-window' now always makes the window's buffer current.
2054It does so even if the window was selected before.
2055
2056** The function `x-select-font' can return a font spec, instead of a
2057font name as a string. Whether it returns a font spec or a font name
2058depends on the graphical library.
2059
2060** `face-spec-set' no longer sets frame-specific attributes when the
2061third argument is a frame (that usage was obsolete since Emacs 22.2).
2062
2063** `set-buffer-multibyte' now signals an error in narrowed buffers.
2064
2065** The CL package's `get-setf-method' function no longer exists.
2066Generalized variables are now part of core Emacs Lisp, and implemented
2067differently to the way cl.el used to do it. It is not possible to
2068define a compatible replacement for `get-setf-method'. See the file
2069gv.el for internal details of the new implementation.
2070
2071** The arguments of `dbus-register-signal' are no longer just strings,
2072but keywords or keyword-string pairs. The old argument list will
2073still be supported for Emacs 24.x.
2074
2075** Miscellaneous name changes
2076Some Lisp symbols have been renamed to correct their spelling,
2077or to be more consistent with standard Emacs terminology.
2078
2079*** Renamed functions
2080**** hangul-input-method-inactivate -> hangul-input-method-deactivate
2081**** inactivate-input-method -> deactivate-input-method
2082**** quail-inactivate -> quail-deactivate
2083**** robin-inactivate -> robin-deactivate
2084**** viper-inactivate-input-method -> viper-deactivate-input-method
2085**** viper-inactivate-input-method-action ->
2086 viper-deactivate-input-method-action
2087**** ucs-input-inactivate -> ucs-input-deactivate
2088
2089*** Renamed hooks
2090The old hooks are still supported for backward compatibility, but they
2091are deprecated and will be removed eventually.
2092**** input-method-inactivate-hook -> input-method-deactivate-hook
2093**** robin-inactivate-hook -> robin-deactivate-hook
2094**** quail-inactivate-hook -> quail-deactivate-hook
2095
2096*** Renamed variables
2097**** follow-deactive-menu -> follow-inactive-menu
2098**** inactivate-current-input-method-function ->
2099 deactivate-current-input-method-function
2100
2101** Some obsolete functions, variables, and faces have been removed:
2102*** `last-input-char', `last-command-char', `unread-command-char'
2103*** `facemenu-unlisted-faces'
2104*** `rmail-decode-mime-charset'
2105*** `iswitchb-read-buffer'
2106*** `sc-version', `sc-submit-bug-report'
2107*** `set-char-table-default'
2108*** `string-to-sequence' (use `string-to-list' or `string-to-vector')
2109*** `compile-internal'
2110*** `modeline'
2111*** `mode-line-inverse-video'
2112*** `follow-mode-off-hook'
2113*** `cvs-commit-buffer-require-final-newline'
2114(use `log-edit-require-final-newline' instead)
2115*** `cvs-changelog-full-paragraphs'
2116(use `log-edit-changelog-full-paragraphs' instead)
2117*** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
2118*** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
2119*** `vc-master-templates' (use `vc-handled-backends' instead)
2120*** `vc-checkout-carefully'
2121
2122
2123* Lisp Changes in Emacs 24.3
2124
2125** CL-style generalized variables are now in core Elisp.
2126`setf' is autoloaded; `push' and `pop' accept generalized variables.
2127You can define your own generalized variables using `gv-define-simple-setter',
2128`gv-define-setter', etc.
2129
2130** Emacs tries to macroexpand interpreted (non-compiled) files during load.
2131This can significantly speed up execution of non-byte-compiled code,
2132but can also bump into previously unnoticed cyclic dependencies.
2133These are generally harmless: they will simply cause the macro calls
2134to be left for later expansion (as before), but will result in a
2135warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
2136You may wish to restructure your code so this does not happen.
2137
2138** New sampling-based Elisp profiler.
2139Try M-x profiler-start, do some work, and then call M-x profiler-report.
2140When finished, use M-x profiler-stop. The sampling rate can be based on
2141CPU time or memory allocations.
2142
2143** `defun' also accepts a (declare DECLS) form, like `defmacro'.
2144The interpretation of the DECLS is determined by `defun-declarations-alist'.
2145
2146** New macros `setq-local' and `defvar-local'.
2147
2148** Face underlining can now use a wave.
2149
2150** `read-regexp' has a new argument HISTORY; the first argument PROMPT
2151of `read-regexp' accepts a string ending with a colon and space, and its
2152second argument DEFAULTS can be a list of strings accessible via `M-n'
2153in the minibuffer ahead of other hard-coded useful regexp-related values.
2154More commands use `read-regexp' now to read their regexp arguments.
2155
2156** Completion
2157
2158*** New function `completion-table-with-quoting' to handle completion
2159in the presence of quoting, such as file completion in shell buffers.
2160
2161*** New function `completion-table-subvert' to use an existing completion
2162table, but with a different prefix.
2163
2164** Debugger
2165
2166*** New error type and new function `user-error'.
2167These do not trigger the debugger.
2168
2169*** New option `debugger-bury-or-kill', saying what to do with the
2170debugger buffer when exiting debug.
2171
2172*** Set `debug-on-message' to enter the debugger when a certain
2173message is displayed in the echo area. This can be useful when trying
2174to work out which code is doing something.
2175
2176*** New var `inhibit-debugger', automatically set to prevent accidental
2177recursive invocations.
2178
2179** Window handling
2180
2181*** New command `fit-frame-to-buffer' adjusts the frame height to
2182fit the contents.
2183
2184*** The command `fit-window-to-buffer' can adjust the frame height
2185if the new option `fit-frame-to-buffer' is non-nil.
2186
2187*** New macro `with-temp-buffer-window', similar to
2188`with-output-to-temp-buffer'.
2189
2190*** `temp-buffer-resize-mode' no longer resizes windows that have been
2191reused.
2192
2193*** New option `switch-to-buffer-preserve-window-point' to restore a
2194window's point when switching buffers.
2195
2196*** New display action alist entries `window-height' and `window-width'
2197specify the size of new windows created by `display-buffer'.
2198
2199*** New display action alist entry `pop-up-frame-parameters', if
2200non-nil, specifies frame parameters to give any newly-created frame.
2201
2202*** New display action alist entry `inhibit-switch-frame', if non-nil,
2203tells display action functions to avoid changing which frame is
2204selected.
2205
2206*** New display action alist entry `previous-window', if non-nil,
2207specifies window to reuse in `display-buffer-in-previous-window'.
2208
2209*** New display action functions `display-buffer-below-selected',
2210and `display-buffer-in-previous-window'.
2211
2212*** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
2213now accept a third argument to avoid choosing the selected window.
2214
2215*** Additional values recognized for option `window-combination-limit'.
2216
2217*** The following variables are obsolete, as they can be replaced by
2218appropriate entries in the `display-buffer-alist' function introduced
2219in Emacs 24.1:
2220**** `dired-shrink-to-fit'
2221**** `display-buffer-reuse-frames'
2222**** `display-buffer-function'
2223**** `special-display-buffer-names'
2224**** `special-display-frame-alist'
2225**** `special-display-function'
2226**** `special-display-regexps'
2227
2228** Time
2229
2230*** `current-time-string' no longer requires that its argument's year
2231must be in the range 1000..9999. It now works with any year supported
2232by the underlying C implementation.
2233
2234*** `current-time' now returns extended-format time stamps
2235(HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
2236PSEC is typically a multiple of 1000 on current machines. Other
2237functions that use this format, such as `file-attributes' and
2238`format-time-string', have been changed accordingly. Old-format time
2239stamps are still accepted.
2240
2241*** The format of timers in `timer-list' and `timer-idle-list' is now
2242[TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
2243The PSECS slot is new, and uses picosecond resolution. It can be
2244accessed via the new `timer--psecs' accessor.
2245
2246*** Last-modified time stamps in undo lists now are of the form
2247(t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
2248
2249** EIEIO
2250
2251*** Improved security when handling persistent objects:
2252
2253**** `eieio-persistent-read' now features optional arguments for specifying
2254the class to load, as well as a flag stating whether subclasses are allowed;
2255if provided, other classes will be rejected by the reader. For
2256compatibility with existing code, if the class is omitted only a
2257warning is issued.
2258
2259**** New specialized reader for pulling in classes and signaling errors
2260without evaluation of suspicious code.
2261
2262**** All slots that contain objects must have a :type. Slots with lists
2263of objects must use a new type predicate for a list of an object type.
2264
2265*** Support for `find-function' and similar utilities, through the addition
2266of filename support to generated symbols.
2267
2268** Floating point functions now always return special values like NaN,
2269instead of signaling errors, if given invalid args; e.g., (log -1.0).
2270Previously, they returned NaNs on some platforms but signaled errors
2271on others. The affected functions are acos, asin, tan, exp, expt,
2272log, log10, sqrt, and mod.
2273
2274** New fringe bitmap `exclamation-mark'.
2275
2276** Miscellaneous changes to special forms and macros
2277
2278*** `defun' and `defmacro' are now macros rather than special forms.
2279
2280*** `kbd' is now a function rather than a macro.
2281
2282** Miscellaneous new functions
2283
2284*** `set-temporary-overlay-map' sets up a temporary keymap that
2285takes precedence over most other maps for a short while (normally one key).
2286
2287*** `autoloadp' tests if its argument is an autoloaded object.
2288
2289*** `autoload-do-load' performs the autoloading operation.
2290
2291*** `buffer-narrowed-p' tests if the buffer is narrowed.
2292
2293*** `file-name-base' returns a file name sans directory and extension.
2294
2295*** `function-get' fetches a function property, following aliases.
2296
2297*** `posnp' tests if an object is a `posn'.
2298
2299*** `system-users' returns the user names on the system.
2300
2301*** `system-groups' returns the group names on the system.
2302
2303*** `tty-top-frame' returns the topmost frame of a text terminal.
2304
2305** The following functions and variables are obsolete:
2306*** `automount-dir-prefix' (use `directory-abbrev-alist')
2307*** `buffer-has-markers-at'
2308*** `macro-declaration-function' (use `macro-declarations-alist')
2309*** `window-system-version' (provides no useful information)
2310*** `dired-pop-to-buffer' (use `dired-mark-pop-up')
2311*** `query-replace-interactive'
2312*** `font-list-limit' (has had no effect since Emacs < 23)
2313
2314
2315* Changes in Emacs 24.3 on Non-Free Operating Systems
2316
2317** Cygwin builds can use the native MS Windows user interface.
2318Pass `--with-w32' to configure. The default remains the X11 interface.
2319
2320** Two new functions are available in Cygwin builds:
2321`cygwin-convert-file-name-from-windows' and
2322`cygwin-convert-file-name-to-windows'. These functions allow Lisp
2323code to access the Cygwin file-name mapping machinery to convert
2324between Cygwin and Windows-native file and directory names.
2325
2326** When invoked with the -nw switch to run on the Windows text-mode terminal,
2327Emacs now supports `mouse-highlight', help-echo (in the echo area), and
2328`mouse-autoselect-window'.
2329
2330** On MS Windows Vista and later Emacs now supports symbolic links.
2331
2332** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
2333support for libxml2, even if its presence is detected.
2334
2335** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
2336
2337** On Mac OS X, configure no longer automatically adds the Fink "/sw"
2338directories to the search path. You must add them yourself if you want them.
2339
2340
2341* Changes in Emacs 24.2
2342
2343** This is mainly a bug-fix release.
2344
2345
2346* Installation Changes in Emacs 24.1
2347
2348** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
2349to configure. Note that other libraries used by Emacs, RSVG and GConf,
2350also depend on Gtk+. You can disable them with --without-rsvg and
2351--without-gconf.
2352
2353** Emacs can be compiled with GnuTLS support.
2354This happens by default if a suitably recent version of the library is
2355found at build time. To prevent this, use the configure option
2356`--without-gnutls'. See below for GnuTLS features.
2357
2358** Emacs can be compiled with SELinux support.
2359This happens by default if a suitably recent version of the library is
2360found at build time. To prevent this, use the configure option
2361`--without-selinux'. See below for SELinux features.
2362
2363** Emacs can be compiled with ImageMagick support.
2364This happens by default if a suitably recent version of the library is
2365found at build time. To prevent this, use the configure option
2366`--without-imagemagick'. See below for ImageMagick features.
2367This feature is not available for the Nextstep or MS ports.
2368
2369** Emacs can be compiled with libxml2 support.
2370This happens by default if a suitably recent version of the library is
2371found at build time. To prevent this, use the configure option
2372`--without-xml2'. See below for libxml2 features.
2373
2374** By default, the installed Info and man pages are compressed.
2375You can disable this by configuring --without-compress-info.
2376
2377** New configure option --with-wide-int.
2378With it, Emacs integers typically have 62 bits, even on 32-bit machines.
2379On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
2380to about 2 GiB.
2381
2382** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
2383These provide no new functionality, they just remove the need to edit
2384lib-src/Makefile by hand in order to use the associated features.
2385
2386** New configure option --enable-use-lisp-union-type.
2387This is only useful for Emacs developers to debug certain types of bugs.
2388This is not a new feature; only the configure flag is new.
2389
2390** The standalone programs digest-doc and sorted-doc are removed.
2391Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
2392
2393** The standalone program `fakemail' is removed.
2394If you need it, feedmail.el provides a superset of the functionality.
2395
2396
2397* Startup Changes in Emacs 24.1
2398
2399** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
2400command line arguments, and the EMACS_UNIBYTE environment variable, no
2401longer have any effect. (They were declared obsolete in Emacs 23.)
2402
2403** New command line option `--no-site-lisp' removes site-lisp directories
2404from load-path. -Q now implies this. This option does not affect the
2405EMACSLOADPATH environment variable (and hence has no effect for
2406Nextstep builds).
2407
2408
2409* Changes in Emacs 24.1
2410
2411** Completion
2412
2413*** Many packages now use the `completion-at-point' command,
2414rather than implementing separate completion commands.
2415
2416*** `completion-at-point' now handles tags and semantic completion.
2417
2418*** Completion in a non-minibuffer now tries to detect the end of completion
2419and pops down the *Completions* buffer accordingly.
2420
2421*** New option `completion-cycle-threshold' allows completion cycling.
2422
2423*** New option `completion-category-overrides' for overriding the
2424default completion style in certain circumstances.
2425
2426*** New completion style `substring'.
2427
2428*** Completion of buffer names uses `substring' completion by default.
2429
2430*** The option `widget-complete-field' has been removed.
2431
2432** Mail changes
2433
2434*** The first time you try sending mail, Emacs asks for a mail method.
2435This is implemented by a new default for `send-mail-function', which
2436is `sendmail-query-once'. This offers to use the smtpmail package, or
2437to use the old defaults relying on external mail facilities
2438(`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
2439`mailclient-send-it' on Windows).
2440
2441*** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
2442transfers the report to your desktop's preferred mail client, if there
2443is one. This uses either the "xdg-email" utility, or Mac OS's "open"
2444command.
2445
2446*** See Changes in Specialized Modes and Packages for SMTPmail changes
2447and Mail mode changes
2448
2449** Emacs server and client changes
2450
2451*** New option `server-port' specifies the port for TCP Emacs servers.
2452
2453*** New emacsclient argument -q/--quiet suppresses some status messages.
2454
2455*** New emacsclient argument --frame-parameters specifies the frame
2456parameters of any newly-created graphical frame.
2457
2458*** If emacsclient shuts down due to Emacs signaling an error,
2459its exit status is 1.
2460
2461*** New emacsclient argument --parent-id ID.
2462This opens a client frame in parent X window ID, via XEmbed, similar
2463to the --parent-id argument to Emacs.
2464
2465** Internationalization changes
2466
2467*** Emacs now supports display and editing of bidirectional text.
2468Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
2469displayed in the correct visual order as expected by users of those
2470scripts. The display reordering is a "full bidirectionality" class
2471implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
2472with no RTL text should look exactly the same as before.
2473
2474**** New buffer-local variable `bidi-display-reordering'.
2475To disable display reordering in a buffer, change this to nil.
2476
2477**** New buffer-local variable `bidi-paragraph-direction'.
2478If nil (the default), Emacs determines the base direction of each
2479paragraph from its text, as specified by the UBA. Setting the value
2480to `right-to-left' or `left-to-right' forces a base direction on each
2481paragraph.
2482
2483Paragraphs with right-to-left base direction are displayed starting at
2484the right window edge.
2485
2486*** Enhanced support for characters with no glyphs in available fonts,
2487or, on text terminals, characters that cannot be encoded by the
2488terminal coding system. The new option `glyphless-char-display-control'
2489specifies how to display them: as a hexadecimal code in a box, a thin
24901-pixel space, an empty box, etc.
2491
2492*** New input methods for Farsi and Bulgarian
2493(farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
2494
2495*** `nobreak-char-display' now also highlights Unicode hyphen chars
2496(U+2010 and U+2011).
2497
2498*** New Hebrew translation of the Emacs Tutorial.
2499Type `C-u C-h t' to choose it in case your language setup doesn't
2500automatically select it.
2501
2502** An Emacs Lisp package manager is now included.
2503This is a convenient way to download and install additional packages,
2504from a package repository at http://elpa.gnu.org.
2505
2506*** M-x list-packages shows a list of packages, which can be
2507selected for installation.
2508
2509*** New command `describe-package', bound to `C-h P'.
2510
2511*** By default, all installed packages are loaded automatically when
2512Emacs starts up. To disable this, set `package-enable-at-startup' to
2513nil. To specify the packages to load, customize `package-load-list'.
2514
2515** Custom theme changes
2516
2517*** New command `M-x customize-themes', which provides a convenient
2518interface for enabling and disabling Custom themes.
2519
2520*** New option `custom-theme-load-path' is the load path for themes.
2521Emacs no longer looks for Custom themes in `load-path'. The default
2522value of `custom-theme-load-path' says to look for themes in
2523`custom-theme-directory', followed by a subdirectory of
2524`data-directory' named "themes/", which contains a small selection of
2525built-in Custom themes.
2526
2527*** New option `custom-safe-themes' records known-safe theme files.
2528If a theme is not in this list, Emacs queries before loading it, and
2529offers to save the theme to `custom-safe-themes' automatically. By
2530default, all themes included in Emacs are treated as safe.
2531
2532** Improved GTK integration
2533
2534*** GTK scroll-bars are now placed on the right by default.
2535The function `set-scroll-bar-mode' can change this.
2536
2537*** GTK tool bars can have just text, just images or images and text.
2538Customize `tool-bar-style' to choose the style. On a Gnome desktop,
2539the default is taken from desktop settings.
2540
2541*** GTK tool bars can be placed on any edge of the frame.
2542The frame-parameter tool-bar-position controls this. It takes the
2543values top, left, right or bottom. The Options => Show/Hide menu has
2544entries for this.
2545
2546*** The default colors for selected text (the `region' face) are taken
2547from the GTK theme when Emacs is built with GTK.
2548
2549*** Emacs uses GTK tooltips by default if built with GTK.
2550You can disable this by changing `x-gtk-use-system-tooltips' to nil.
2551
2552** Graphical interface changes
2553
2554*** On graphical displays, the mode-line no longer ends in dashes.
2555Also, the first dash (which does not indicate anything) is just
2556displayed as a space.
2557
2558*** `menu-bar-select-buffer-function' lets you choose another operation
2559instead of `switch-to-buffer' when selecting an item in the Buffers menu.
2560
2561*** Lucid menus and dialogs can display antialiased fonts if Emacs is
2562built with Xft. These fonts can be set via X resources, for example:
2563Emacs.pane.menubar.font: Courier-12
2564
2565** Exiting changes
2566
2567*** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
2568or if it receives a SIGINT signal in batch mode.
2569
2570*** `kill-emacs-hook' is now also run in batch mode.
2571Third-party code which adds to `kill-emacs-hook' should check if they
2572do the right thing in batch mode.
2573
2574** Scrolling changes
2575
2576*** New scrolling commands `scroll-up-command' and `scroll-down-command'
2577(bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
2578of buffer at first key-press (instead they move to top/bottom of buffer)
2579when `scroll-error-top-bottom' is non-nil.
2580
2581*** New option `scroll-error-top-bottom' (see above).
2582
2583*** New scrolling commands `scroll-up-line' and `scroll-down-line'
2584scroll a line instead of full screen.
2585
2586*** New property `scroll-command' should be set on a command's symbol to
2587define it as a scroll command affected by `scroll-preserve-screen-position'.
2588
2589*** If you customize `scroll-conservatively' to a value greater than 100,
2590Emacs will never recenter point in the window when it scrolls due to
2591cursor motion commands or commands that move point (e.f., `M-g M-g').
2592Previously, you needed to use `most-positive-fixnum' as the value of
2593`scroll-conservatively' to achieve the same effect.
2594
2595*** "Aggressive" scrolling now honors the scroll margins.
2596If you customize `scroll-up-aggressively' or
2597`scroll-down-aggressively' and move point off the window, Emacs now
2598scrolls the window so as to avoid positioning point inside the scroll
2599margin.
2600
2601** Basic SELinux support has been added.
2602This requires Emacs to be linked with libselinux at build time.
2603
2604*** Emacs preserves the SELinux file context when backing up.
2605Also, the function `copy-file' has an extra optional argument for
2606preserving SELinux context, and the return value of `backup-buffer'
2607now includes the SELinux context.
2608
2609*** New functions `file-selinux-context' and `set-file-selinux-context'
2610get and set the SELinux context of a file.
2611
2612** Trash changes
2613
2614*** `delete-by-moving-to-trash' now only affects commands that specify
2615trashing. This avoids inadvertently trashing temporary files.
2616
2617*** Calling `delete-file' or `delete-directory' with a prefix argument
2618now forces true deletion, regardless of `delete-by-moving-to-trash'.
2619
2620** File- and directory-local variable changes
2621
2622*** You can stop directory local vars from applying to subdirectories.
2623Add an element (subdirs . nil) to the alist portion of any variables
2624settings to indicate that the section should not apply to
2625subdirectories.
2626
2627*** Directory local variables can apply to some file-less buffers.
2628Affected modes include dired, vc-dir, and log-edit. For example,
2629adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
2630turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
2631`hack-dir-local-variables-non-file-buffer' to support this.
2632
2633*** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
2634Instead, use "eval: (minor-mode 1)".
2635
2636*** The variable `inhibit-first-line-modes-regexps' has been renamed
2637to `inhibit-local-variables-regexps'. As the name suggests, it now
2638applies to ALL file local variables, not just -*- lines. The
2639associated `inhibit-first-line-modes-suffixes' has been renamed in the
2640corresponding way.
2641
2642** Window changes
2643
2644*** The `quit-window' command now restores the last buffer displayed
2645in the quitted window.
2646
2647*** Resizing an Emacs frame now preserves proportional window sizes,
2648modulo restrictions like window minimum sizes and fixed-size windows.
2649
2650*** The behavior of `display-buffer' is now customizable in detail.
2651
2652**** New option `display-buffer-base-action' specifies a list of
2653user-determined display "actions" (functions and optional arguments
2654for choosing the displaying window).
2655
2656This takes precedence over the default display action, which is
2657specified by `display-buffer-fallback-action'.
2658
2659**** New option `display-buffer-alist' maps buffer name regexps to
2660display actions, taking precedence over `display-buffer-base-action'.
2661
2662*** New option `window-combination-limit'.
2663The new option `window-combination-limit' allows to return the space
2664obtained for resizing or creating a window more reliably to the window
2665from which such space was obtained.
2666
2667*** New option `window-combination-resize'.
2668The new option `window-combination-resize' allows to split a window that
2669otherwise cannot be split because it's too small by stealing space from
2670other windows in the same combination. Subsequent resizing or deletion
2671of the window will resize all windows in the same combination as well.
2672
2673*** New option `frame-auto-hide-function' lets you choose between
2674iconifying or deleting a frame when burying a buffer in a dedicated
2675frame, or quitting a window showing a buffer in a frame of its own.
2676
2677*** New commands `maximize-window' and `minimize-window'.
2678These maximize and minimize the size of a window within its frame.
2679
2680*** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
2681These functions allow to navigate through the live buffers that have
2682been shown in a specific window.
2683
2684** Minibuffer changes
2685
2686*** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
2687This is handy for minibuffer-only frames, and is also used for the feature
2688where mouse-1 pops up *Messages*"', which can now easily be changed.
2689
2690*** Minibuffers set `truncate-lines' to nil.
2691If you want to change the value to something else, you could use
2692for example `minibuffer-setup-hook'.
2693
2694** `auto-mode-case-fold' is now enabled by default.
2695
2696** `backup-by-copying-when-mismatch' now defaults to t.
2697
2698** New basic faces `error', `warning', `success'.
2699These are used to highlight text indicating failure, caution or
2700successful operation.
2701
2702** New option `list-colors-sort' defines the color sort order
2703for `list-colors-display'.
2704
2705** The variable `focus-follows-mouse' now always defaults to nil.
2706
2707
2708* Editing Changes in Emacs 24.1
2709
2710** Search changes
2711
2712*** C-y in Isearch is now bound to `isearch-yank-kill', instead of
2713`isearch-yank-line'.
2714
2715*** M-y in Isearch is now bound to `isearch-yank-pop', instead of
2716`isearch-yank-kill'.
2717
2718*** M-s C-e in Isearch is now bound to `isearch-yank-line'.
2719
2720** New commands `count-words-region' and `count-words'.
2721
2722*** M-= is bound to `count-words-region', not `count-lines-region'.
2723The `count-words-region' command, when called interactively, reports
2724the number of lines, words, and characters in the region. It is a
2725superset of the old `count-lines-region', which is now an obsolete
2726alias for it.
2727
2728** The command `just-one-space' (M-SPC), if given a negative argument,
2729also deletes newlines around point.
2730
2731** Deletion changes
2732
2733*** New option `delete-active-region'.
2734If non-nil, [delete] and DEL delete the region if it is active and no
2735prefix argument is given. If set to `kill', those commands kill
2736instead.
2737
2738*** New command `delete-forward-char', bound to [delete].
2739This is meant for interactive use, and obeys `delete-active-region'.
2740The command `delete-char' does not obey `delete-active-region'.
2741
2742*** `delete-backward-char' is now a Lisp function.
2743Apart from obeying `delete-active-region', its behavior is unchanged.
2744However, the byte compiler now warns if it is called from Lisp; Lisp
2745callers should use delete-char with a negative argument instead.
2746
2747*** The option `mouse-region-delete-keys' has been deleted.
2748
2749** Selection changes.
2750
2751The default handling of clipboard and primary selections has been
2752changed to conform with modern X applications. In short, most
2753commands for killing and yanking text now use the clipboard, while
2754mouse commands use the primary selection.
2755
2756In the following, we provide a list of these changes, followed by a
2757list of steps to get the old behavior back if you prefer that.
2758
2759*** `select-active-regions' now defaults to t.
2760Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
2761the kill ring. The selected text is put in the primary selection, if
2762the system possesses a separate primary selection facility (e.g. X).
2763
2764**** `select-active-regions' also accepts a new value, `only'.
2765This means to only set the primary selection for temporarily active
2766regions (usually made by mouse-dragging or shift-selection);
2767"ordinary" active regions, such as those made with C-SPC followed by
2768point motion, do not alter the primary selection.
2769
2770**** `mouse-drag-copy-region' now defaults to nil.
2771
2772*** mouse-2 is now bound to `mouse-yank-primary'.
2773This pastes from the primary selection, ignoring the kill-ring.
2774Previously, mouse-2 was bound to `mouse-yank-at-click'.
2775
2776*** `x-select-enable-clipboard' now defaults to t on all platforms.
2777
2778*** `x-select-enable-primary' now defaults to nil.
2779Thus, commands that kill text or copy it to the kill-ring (such as
2780M-w, C-w, and C-k) also use the clipboard---not the primary selection.
2781
2782**** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
2783exactly equivalent to M-w, C-w, and C-y respectively.
2784
2785**** Note that on MS-Windows, `x-select-enable-clipboard' was already
2786non-nil by default, as Windows does not support the primary selection
2787between applications.
2788
2789*** To return to the previous behavior, do the following:
2790
2791**** Change `select-active-regions' to nil.
2792**** Change `mouse-drag-copy-region' to t.
2793**** Change `x-select-enable-primary' to t (on X only).
2794**** Change `x-select-enable-clipboard' to nil.
2795**** Bind `mouse-yank-at-click' to mouse-2.
2796
2797*** Support for X cut buffers has been removed.
2798
2799*** X clipboard managers are now supported.
2800To inhibit this, change `x-select-enable-clipboard-manager' to nil.
2801
2802** New command `C-x r N' (`rectangle-number-lines') numbers the lines
2803in the current rectangle. With a prefix argument, this prompts for a
2804number to count from and for a format string.
2805
2806** `redisplay-dont-pause' now defaults to t.
2807This makes Emacs feel more responsive to editing commands that arrive
2808at high rate, e.g. if you lean on some key, because stopping redisplay
2809in the middle (when this variable is nil) forces more expensive
2810updates later on, and Emacs appears to be unable to keep up.
2811
2812** The behavior of <TAB> for active regions in Text mode has changed.
2813In Text and related modes, typing <TAB> (`indent-for-tab-command')
2814when the region is active causes Emacs to indent all the lines in the
2815region, aligning them with the line previous to the first line in the
2816region (or with the left margin if there is no previous line).
2817
2818** When `occur' is called with a prefix argument, matching strings are
2819collected into the `*Occur*' buffer without line numbers. If there
2820are parenthesized subexpressions in the specified regexp, `occur'
2821reads replacement text that may contain \\& and \\N whose convention
2822follows `replace-match'.
2823
2824
2825* Changes in Specialized Modes and Packages in Emacs 24.1
2826
2827** Archive Mode has basic support for browsing and updating 7z archives.
2828
2829** BibTeX mode
2830
2831*** BibTeX mode now supports biblatex.
2832Use the variable `bibtex-dialect' to select different BibTeX dialects.
2833`bibtex-entry-field-alist' is now an obsolete alias for
2834`bibtex-BibTeX-entry-alist'.
2835
2836*** New command `bibtex-search-entries', bound to C-c C-a.
2837
2838*** New `bibtex-entry-format' option `sort-fields', disabled by default.
2839
2840*** New variable `bibtex-search-entry-globally'.
2841
2842** Browse-url
2843
2844*** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
2845
2846*** The default browser used by the package is now the "xdg-open" program,
2847on platforms that support it. This calls your desktop's preferred browser.
2848
2849** Calc
2850
2851*** Support for musical notes.
2852
2853*** Support for logarithmic units.
2854
2855*** No longer uses the tex prefix for TeX specific unit names when
2856using TeX or LaTeX mode.
2857
2858*** New option to highlight selections using faces.
2859
2860*** `calc-histogram' has the option of using a vector to determine the bins.
2861
2862*** New "O" option prefix.
2863
2864*** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
2865
2866** Calendar, Diary, and Appt
2867
2868*** Diary entries can contain non-printing "comments".
2869See the variable `diary-comment-start'.
2870
2871*** Appointments can specify their individual warning times.
2872See the variable `appt-warning-time-regexp'.
2873
2874*** The function specified by `appt-disp-window-function' may be passed
2875lists of arguments if multiple appointments are due at similar times.
2876If you are using a custom function for this, you should update it.
2877
2878*** New function `diary-hebrew-birthday'.
2879
2880*** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
2881may no longer be nil, but must all be strings.
2882
2883*** The obsolete (since Emacs 22.1) method of enabling the appt
2884package by adding `appt-make-list' to `diary-hook' has been removed.
2885Use `appt-activate' instead.
2886
2887*** Some appt variables (obsolete since Emacs 22.1) have been removed:
2888appt-issue-message (use the function appt-activate)
2889appt-visible/appt-msg-window (use the variable appt-display-format)
2890
2891*** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
2892view-diary-entries, list-diary-entries, show-all-diary-entries
2893
2894** CC Mode
2895
2896*** New feature to "guess" the style in an existing buffer.
2897The main entry point is M-x c-guess.
2898
2899*** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
2900
2901*** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
2902Thus C-M-a will, by default, go to the beginning of the immediate function,
2903not the top level.
2904
2905*** "Macros with semicolons" can be registered for correct indentation.
2906Where such a macro ends a line (no semicolon) the next statement is no longer
2907parsed as a statement continuation.
2908
2909** Comint and modes derived from it use the standard completion code.
2910
2911** Compilation mode
2912
2913*** Compilation mode can be used without Font Lock mode.
2914`compilation-parse-errors-function' is now obsolete.
2915
2916*** New variable `compilation-filter-start', which is bound while
2917`compilation-filter-hook' runs. It records the start position of the
2918text inserted by `compilation-filter'.
2919
2920*** `compilation-error-screen-columns' and `compilation-first-column'
2921are obeyed in the editing buffer. So programming language modes can
2922set them, whereas previously only the value in the *Compilation*
2923buffer was used.
2924
2925** Customize
2926
2927*** Customize buffers now contain a search field.
2928The search is performed using `customize-apropos'.
2929To turn off the search field, set `custom-search-field' to nil.
2930
2931*** Options in customize group buffers start out hidden if not customized.
2932Use the arrow to the left of the option name to toggle visibility.
2933
2934*** custom-buffer-sort-alphabetically now defaults to t.
2935
2936*** The color widget now has a "Choose" button, which allows you to
2937choose a color via `list-colors-display'.
2938
2939** D-Bus
2940
2941*** It is now possible to access buses other than the default system
2942or session bus.
2943
2944*** The `dbus-register-method' and `dbus-register-property' functions
2945optionally do not register names.
2946
2947*** The new function `dbus-register-service' registers a known service
2948name on a D-Bus without also registering a property or a method.
2949
2950** Dired-x
2951
2952*** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
2953if called with a prefix argument, read a file name from the minibuffer
2954instead of using the current buffer.
2955
2956*** The "dired local variables" feature of Dired-x is obsolete.
2957The standard directory local variables feature replaces it.
2958
2959** ERC changes
2960
2961*** New options `erc-autojoin-timing' and `erc-autojoin-delay',
2962controlling attempts to autojoin a channel.
2963
2964*** New variable `erc-coding-system-precedence': If we use `undecided'
2965as the server coding system, this variable will then be consulted.
2966The default is to decode strings that can be decoded as utf-8 as
2967utf-8, and do the normal `undecided' decoding for the rest.
2968
2969** Eshell changes
2970
2971*** The default value of `eshell-directory-name' has changed
2972to be an "eshell" directory in `user-emacs-directory'.
2973The old "~/.eshell/" directory is still used if it exists, though.
2974
2975** gdb-mi
2976
2977*** The M-x gdb command now uses the GDB Machine Interface protocol.
2978It now supports multithread non-stop debugging and simultaneous
2979debugging of several threads.
2980
2981** Image mode
2982
2983*** RET (`image-toggle-animation') toggles animation, if applicable.
2984Animation plays once, unless the option `image-animate-loop' is non-nil.
2985
2986** Info
2987
2988*** New command M-x info-display-manual displays a named Info manual.
2989If that manual is already visited in some Info buffer, it displays
2990that buffer. (This is handy if you have many manuals in many *info*
2991buffers, and don't remember the name of the buffer visiting the manual
2992you want to consult.) Otherwise, it loads and displays the manual.
2993
2994*** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
2995This is for compatibility with the stand-alone Info reader program,
2996and also because `Info-edit' is a rarely used command that is disabled
2997by default.
2998
2999** Mail mode changes (not Message mode)
3000
3001*** New command M-x mail-add-attachment for adding MIME attachments
3002
3003*** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
3004(Its name is misleading, since it has nothing to do with MIME
3005attachments.) The old name is now an obsolete alias to the new name.
3006
3007** MH-E has been updated to MH-E version 8.3.1.
3008See MH-E-NEWS for details.
3009
3010** Modula-2 mode provides auto-indentation.
3011
3012** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
3013
3014** nXML mode no longer binds C-RET to `nxml-complete'.
3015Completion is now performed via `completion-at-point', bound to C-M-i
3016or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
3017default), this performs tag completion.
3018
3019** Org mode has been updated to version 7.8.09.
3020See ORG-NEWS for details.
3021
3022** Prolog mode has been completely revamped, with lots of additional
3023functionality such as more intelligent indentation, electricity,
3024support for more variants, including Mercury, and a lot more.
3025
3026** Rmail
3027
3028*** The command `rmail-epa-decrypt' decrypts OpenPGP data
3029in the Rmail incoming message.
3030
3031*** The variable `rmail-message-filter' no longer has any effect.
3032This change was made in Emacs 23.1 but was not advertised at the time.
3033Try using `rmail-show-message-hook' instead.
3034
3035** Shell mode
3036
3037*** M-x shell prompts for the shell path name if the default directory
3038is a remote file name and neither the environment variable $ESHELL nor
3039the variable `explicit-shell-file-name' is set.
3040
3041*** TAB is now bound to the standard `completion-at-point' command,
3042which now implements the pcomplete rules for shell command completion.
3043
3044** SMTPmail
3045
3046*** SMTPmail now uses encrypted connections (via STARTTLS) by default
3047if the mail server supports them. This uses either built-in GnuTLS
3048support, or the starttls.el library. Customize `smtpmail-stream-type'
3049to change this.
3050
3051*** The variable `smtpmail-auth-credentials' has been removed.
3052By default, the information is now stored in the file ~/.authinfo.
3053This was the default value of smtpmail-auth-credentials. If you had
3054customized smtpmail-auth-credentials to a list of user names and
3055passwords, those settings are not used. During your first connection
3056to the smtp server, Emacs will prompt for the user name and password,
3057and offer to save them to ~/.authinfo. Or you can manually copy the
3058credentials to ~/.authinfo. For example, if you had
3059
3060 (setq smtpmail-auth-credentials
3061 '(("mail.example.org" 25 "jim" "s!cret")))
3062
3063then the equivalent line in ~/.authinfo would be
3064
3065 machine mail.example.org port 25 login jim password s!cret
3066
3067See the auth-source manual for more information, e.g. on encrypting
3068the credentials file.
3069
3070*** The variable `smtpmail-starttls-credentials' has been removed.
3071If you had that set, you need to put
3072
3073 machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
3074
3075in your ~/.authinfo file instead.
3076
3077*** SMTPmail defaults to using the address in the From: header as the
3078SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
3079to the address you wish to use instead.
3080
3081** SQL mode
3082
3083*** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
3084and `sql-oracle-scan-on'.
3085
3086*** New options controlling prompting for login parameters.
3087Each supported product has a custom variable `sql-*-login-params',
3088which is a list of the parameters to be prompted for before a
3089connection is established.
3090
3091*** The command `sql-product-interactive' now takes a prefix argument,
3092which causes it to prompt for an SQL product.
3093
3094*** Product-specific SQL interactive commands now take prefix arguments.
3095These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
3096given a prefix argument, prompt for a name for the SQL interactive
3097buffer. This reduces the need for calling `sql-rename-buffer'.
3098
3099*** SQL interactive modes suppress command continuation prompts, and
3100replace tabs with spaces. The first change impacts multiple line SQL
3101statements entered with C-j between each line, statements yanked into
3102the buffer and statements sent with `sql-send-*' functions. The
3103second prevents the MySQL and Postgres interpreters from listing
3104object name completions when sent text via `sql-send-*' functions.
3105
3106*** New command `sql-connect' starts a predefined SQLi session,
3107using the login parameters from `sql-connection-alist'.
3108
3109*** New "Save Connection" menu item in SQLi buffers.
3110This gathers the login params specified for the SQLi session, if it
3111was not started by a connection, and saves them as a new connection.
3112
3113*** New commands for listing database objects and details:
3114sql-list-all and sql-list-table.
3115
3116*** An API for manipulating SQL product definitions has been added.
3117
3118** TeX modes
3119
3120*** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
3121
3122** Tramp
3123
3124*** New inline access method "ksu" (kerberized su).
3125
3126*** The following access methods are discontinued: "ssh1_old",
3127"ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
3128
3129*** The user option `remote-file-name-inhibit-cache' controls whether
3130remote file attributes are cached for better performance.
3131
3132*** The option `ange-ftp-binary-file-name-regexp' has changed its
3133default value to "".
3134
3135*** Handlers for `file-selinux-context' and `set-file-selinux-context'
3136for remote machines which support SELinux.
3137
3138** New function `url-queue-retrieve', which behaves like url-retrieve,
3139but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
3140the degree of parallelism.
3141
3142** VC and related modes
3143
3144*** Support for pulling on distributed version control systems.
3145The command C-x v + (`vc-pull') runs a "pull" operation, if it is
3146supported (currently with Bzr, Git, and Mercurial), to update the
3147current branch and working tree. A prefix argument means to prompt
3148the user for specifics, e.g. a pull location.
3149
3150*** `vc-update' is now an alias for `vc-pull'.
3151
3152*** Support for merging on distributed version control systems.
3153The command C-x v m (`vc-merge') now runs a "merge" operation, if it
3154is supported (currently with Bzr, Git, and Mercurial), to merge
3155changes from another branch into the current one. It prompts for
3156specifics, e.g. a merge source.
3157
3158*** New option `vc-revert-show-diff' controls whether `vc-revert'
3159shows a diff while querying the user. It defaults to t.
3160
3161*** Log entries in some Log View buffers can be toggled to display a
3162longer description by typing RET (log-view-toggle-entry-display).
3163This is currently supported for Bzr, Git, and Mercurial (to support
3164another backend, define a `log-view-expanded-log-entry-function').
3165In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
3166use this to display the full log entry for the revision at point.
3167
3168*** New command `vc-ediff' allows visual comparison of two revisions
3169of a file similar to `vc-diff', but using ediff backend.
3170
3171*** The option `vc-initial-comment' was removed in Emacs 23.2, but
3172this was not advertised at the time.
3173
3174*** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
3175Since Emacs 23, it has done the same thing as `toggle-read-only', but
3176this was not advertised at the time.
3177
3178** Obsolete modes
3179
3180*** abbrevlist.el
3181
3182*** erc-hecomplete.el (use erc-pcomplete.el instead)
3183
3184*** partial-completion-mode (complete.el) is obsolete.
3185You can get a comparable behavior with:
3186(setq completion-styles '(partial-completion initials))
3187(setq completion-pcm-complete-word-inserts-delimiters t)
3188
3189*** pc-mode.el is obsolete (CUA mode is much more comprehensive).
3190
3191*** pgg is obsolete (use EasyPG instead).
3192
3193*** sregex.el is obsolete, since rx.el is a strict superset.
3194
3195*** s-region.el and pc-select.el are obsolete.
3196They are superseded by shift-select-mode, enabled by default since 23.1.
3197
3198*** vc-mcvs.el is obsolete (for lack of a maintainer).
3199
3200** Miscellaneous
3201
3202*** The Landmark game is now invoked with `landmark', not `lm'.
3203Its functions and variables have been similarly renamed.
3204
3205*** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
3206(This interfered with cua-mode.)
3207
3208*** f90.el has some support for Fortran 2008 syntax.
3209
3210*** `copyright-fix-years' can optionally convert consecutive years to ranges.
3211
3212*** New command `nato-region' converts text to NATO phonetic alphabet.
3213
3214
3215* New Modes and Packages in Emacs 24.1
3216
3217** Occur Edit mode applies edits made in *Occur* buffers to the
3218original buffers. It is bound to "e" in Occur mode.
3219
3220** New global minor mode electric-pair-mode.
3221When enabled, typing an open parenthesis automatically inserts the
3222matching closing one.
3223
3224** New global minor mode electric-indent-mode.
3225When enabled, typing certain characters triggers reindentation.
3226Major modes wishing to use this can set electric-indent-chars or
3227electric-indent-functions.
3228
3229** New global minor mode electric-layout-mode.
3230When enabled, typing certain characters automatically inserts newlines.
3231Major modes wishing to use this can set electric-layout-rules.
3232
3233** tabulated-list.el provides a generic major mode for tabulated data,
3234from which other modes can be derived.
3235
3236** pcase.el provides the ML-style pattern matching macro `pcase'.
3237
3238** secrets.el is an implementation of the Secret Service API, an
3239interface to password managers like GNOME Keyring or KDE Wallet. The
3240Secret Service API requires D-Bus for communication. The command
3241`secrets-show-secrets' offers a buffer with a visualization of the
3242secrets.
3243
3244** notifications.el provides an implementation of the Desktop
3245Notifications API. It requires D-Bus for communication.
3246
3247** soap-client.el supports access to SOAP web services from Emacs.
3248soap-inspect.el is an interactive inspector for SOAP WSDL structures.
3249
3250** New generic mode, xmodmap-generic-mode, for xmodmap files.
3251
3252** New emacs-lock.el package.
3253The previous version has been moved to obsolete/old-emacs-lock.el.
3254Now, there is a proper minor mode `emacs-lock-mode'. Protection
3255against exiting Emacs and killing the buffer can be set separately.
3256The mechanism for automatically turning off protection for buffers
3257with dead inferior processes has been generalized.
3258
3259
3260* Incompatible Lisp Changes in Emacs 24.1
3261
3262** Passing a nil argument to a minor mode function call now ENABLES
3263the minor mode unconditionally. This is so that you can write e.g.
3264
3265 (add-hook 'text-mode-hook 'foo-mode)
3266
3267to enable foo-mode in Text mode buffers, removing the need for
3268`turn-on-foo-mode' style functions. This affects all mode commands
3269defined by `define-minor-mode'. If called interactively, the mode
3270command still toggles the minor mode.
3271
3272** The return value of `backup-buffer' has changed.
3273It is now a list of three elements, where the second element is a list
3274describing the original file's SELinux context. If Emacs or the
3275system lacks SELinux support, the context list is (nil nil nil nil).
3276See "Basic SELinux support" above, under "Changes in Emacs 24.1".
3277
3278** `char-direction-table' and the `char-direction' function were deleted.
3279They were buggy and inferior to the new support of bidirectional
3280editing introduced in Emacs 24. If you need the bidirectional
3281properties of a character, use `get-char-code-property' with the last
3282argument `bidi-class'.
3283
3284** `copy-directory' now copies the source directory as a subdirectory
3285of the target directory, if the latter is an existing directory. The
3286new optional arg COPY-CONTENTS, if non-nil, makes the function copy
3287the contents directly into a pre-existing target directory.
3288
3289** For mouse click input events in the text area, the Y pixel
3290coordinate in the POSITION list now counts from the top of the text
3291area, excluding any header line. Previously, it counted from the top
3292of the header line.
3293
3294** Support for "old-style" backquotes, obsolete for 10+ years, has
3295been further reduced. Now a backquote not followed by a space is
3296always treated as a "new-style" backquote. Please remove all
3297"old-style" backquotes from your code. If your code uses backquotes
3298as documented in the Elisp manual, and compiles without warning, then
3299you have nothing to do in this regard. Code not following the
3300appropriate conventions may fail to compile.
3301
3302The most common cause of trouble seems to be an old-style backquote
3303followed by a newline. Another cause of trouble is vector notation
3304for key sequence notation: instead of [(control ,)] and [(control ')],
3305you should write [(control ?,)] and [(control ?')], which will work in
3306older Emacsen too.
3307
3308** The macro `eval-at-startup' was removed in Emacs 23.2, but this
3309was not advertised at the time. The function `custom-initialize-delay'
3310replaced all known uses.
3311
3312** `view-buffer' now treats special mode-class in the same way that
3313`view-file' has since Emacs 22 (i.e. it won't enable View mode if the
3314major mode is special).
3315
3316** Menu and tool bar changes
3317
3318*** During startup, Emacs no longer adds entries for `menu-bar-lines'
3319and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
3320With these alist entries omitted, `make-frame' checks the value of the
3321variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
3322a menu-bar or tool-bar, respectively. If the alist entries are added,
3323they override the value of `menu-bar-mode'/`tool-bar-mode'.
3324
3325*** The menu bar bindings's caches are not used any more.
3326Use (where-is-internal <def> nil t) instead.
3327
3328** Regions created by mouse dragging are now normal active regions,
3329similar to those created by shift-selection (see Selection changes
3330above). In previous Emacs versions, these regions were delineated by
3331`mouse-drag-overlay'; that variable has been removed.
3332
3333** The fourth argument of `filter-buffer-substring' has been removed.
3334If you want to remove text properties from the final result, simply
3335pass the result through substring-no-properties.
3336
3337** cl.el no longer provides `cl-19'.
3338
3339** The following obsolete functions and aliases have been removed
3340(the appropriate new function is given in parentheses; "not needed"
3341means you can just remove all calls to the function in question):
3342
3343*** `comint-kill-output' (`comint-delete-output')
3344*** `decompose-composite-char' (`char-to-string')
3345*** `outline-visible' (`outline-invisible-p')
3346*** `internal-find-face' (`facep')
3347*** `internal-get-face' (`facep and check-face')
3348*** `frame-update-faces' (not needed)
3349*** `frame-update-face-colors' (`frame-set-background-mode')
3350*** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
3351*** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
3352*** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
3353*** `x-make-font-bold-italic' (`make-face-bold-italic')
3354*** `x-make-font-unbold' (`make-face-unbold')
3355*** `x-make-font-unitalic' (`make-face-unitalic')
3356*** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
3357*** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
3358*** `iswitchb-default-keybindings' (`iswitchb-mode')
3359*** `char-bytes' (== 1)
3360*** `isearch-return-char' (`isearch-printing-char')
3361*** `make-local-hook' (not needed)
3362*** `set-screen-height' (`set-frame-height')
3363*** `set-screen-width' (`set-frame-width')
3364
3365** The following obsolete variables and varaliases have been removed
3366(the appropriate new variable is given in parentheses):
3367
3368*** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
3369*** `vc-header-alist' (`vc-BACKEND-header')
3370*** `directory-sep-char' (== ?/)
3371*** `font-lock-defaults-alist' (`font-lock-defaults')
3372*** `e' (`float-e').
3373
3374** The following obsolete files were removed:
3375sc.el, x-menu.el, rnews.el, rnewspost.el
3376
3377** The format of the finder-inf.el file has changed, since the Finder
3378mechanism is now based on the package system. The variable
3379`finder-package-info' is replaced by `package--builtins' and
3380`finder-keywords-hash'.
3381
3382** When generating autoloads, `update-directory-autoloads' no longer
3383assumes every inspected file is in your `load-path'. It instead
3384generates relative names according to the current `load-path'.
3385
3386
3387* Lisp Changes in Emacs 24.1
3388
3389** Code can now use lexical scoping by default instead of dynamic scoping.
3390The `lexical-binding' variable enables lexical scoping for local
3391variables. It is typically set via a file-local variable in the first
3392line of the file, in which case it applies to all the code in that
3393file.
3394
3395*** `eval' takes a new optional argument `lexical' to choose the new lexical
3396binding instead of the old dynamic binding mode.
3397
3398*** Lexically scoped interpreted functions are represented with a new form
3399of function value which looks like (closure ENV ARGS &rest BODY).
3400
3401*** New macro `letrec' to define recursive local functions.
3402
3403*** `defvar' and `defconst' now mark the variable as special (dynamic).
3404So do `defcustom' and other forms that call `defvar' as a subroutine.
3405
3406*** New function `special-variable-p' to check whether a variable is
3407declared as dynamically bound.
3408
3409*** The form ((lambda ...) ...) is deprecated.
3410
3411** An Emacs Lisp testing tool is now included.
3412Emacs Lisp developers can use this tool to write automated tests for
3413their code. See the ERT info manual for details.
3414
3415** Changes for bidirectional display and editing
3416
3417*** New function `current-bidi-paragraph-direction'.
3418This returns the base direction of the paragraph at point.
3419
3420*** New function `bidi-string-mark-left-to-right'.
3421Given a string containing characters from right-to-left scripts, this
3422function returns another string which can be safely inserted into a
3423buffer, such that any following text will be always displayed to the
3424right of that string. (This works by appending an invisible Unicode
3425"LEFT-TO-RIGHT MARK" character if the argument string might need it.)
3426
3427This is useful when the buffer has overall left-to-right paragraph
3428direction and you need to insert a string whose contents are not known
3429in advance, without disrupting the layout of the line.
3430
3431** Window changes
3432
3433*** Window tree functions are accessible in Elisp.
3434Functions are provided to return the parent, siblings or child windows
3435of any window including internal windows (windows not associated with a
3436buffer) in the window tree.
3437
3438**** New function `window-valid-p' gives non-nil for live and internal
3439windows.
3440
3441**** Window manipulation can deal with internal windows.
3442Many window handling functions like `split-window', `delete-window', or
3443`delete-other-windows' as well as the window resizing functions can now
3444act on any window including internal ones.
3445
3446*** window-total-height/-width vs window-body-height/-width.
3447The function `window-height' has been renamed to `window-total-height'
3448and `window-width' has been renamed to `window-body-width'. The old
3449names are provided as aliases. Two new functions `window-total-width'
3450and `window-body-height' are provided.
3451
3452*** Window parameters specific to window handling functions.
3453For each window you can specify a parameter to override the default
3454behavior of a number of functions like `split-window', `delete-window'
3455and `delete-other-windows'. The variable `ignore-window-parameters'
3456allows to ignore processing such parameters.
3457
3458*** New semantics of third argument of `split-window'.
3459The third argument of `split-window' has been renamed to SIDE and can be
3460set to any of the values 'below, 'right, 'above, or 'left to make the
3461new window appear on the corresponding side of the window that shall be
3462split. Any other value of SIDE will cause `split-window' to split the
3463window into two side-by-side windows as before.
3464
3465*** Window resizing functions.
3466A new standard function for resizing windows called `window-resize' has
3467been introduced. This and all other functions for resizing windows no
3468longer delete any windows when they become too small.
3469
3470*** Deleting the selected window now selects the most recently selected
3471live window on that frame instead.
3472
3473*** `adjust-window-trailing-edge' adjustments.
3474`adjust-window-trailing-edge' can now deal with fixed-size windows and
3475is able to resize other windows if a window adjacent to the trailing
3476edge cannot be shrunk any more. This makes its behavior more similar to
3477that of Emacs 21 without compromising, however, its inability to delete
3478windows which was introduced in Emacs 22.
3479
3480*** Window-local buffer lists.
3481Windows now have local buffer lists. This means that removing a buffer
3482from display in a window will preferably show the buffer previously
3483shown in that window with its previous window-start and window-point
3484positions. This also means that the same buffer may be automatically
3485shown twice even if it already appears in another window.
3486
3487*** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
3488which if non-nil requires the buffer to be displayed in the currently
3489selected window, signaling an error otherwise. If nil, another window
3490can be used, e.g. if the selected one is strongly dedicated.
3491
3492*** `split-window-vertically' and `split-window-horizontally' renamed
3493to `split-window-below' and `split-window-right' respectively.
3494The old names are kept as aliases.
3495
3496*** Display actions
3497
3498**** The second arg to `display-buffer' and `pop-to-buffer' is now
3499named ACTION, and takes a display action of the same form as
3500`display-buffer-base-action' (see Changes, above). A non-nil,
3501non-list value is treated specially, as the old meaning.
3502
3503**** New variable `display-buffer-overriding-action'.
3504
3505**** The procedure of `display-buffer' etc. to choose a window is
3506determined by combining `display-buffer-overriding-action',
3507`display-buffer-alist', the ACTION arg, `display-buffer-base-action',
3508and `display-buffer-fallback-action'. The second and fourth of these
3509are user-customizable variables.
3510
3511See the docstring of `display-buffer' for details.
3512
3513*** New functions `window-state-get' and `window-state-put'.
3514These functions allow to save and restore the state of an arbitrary
3515frame or window as an Elisp object.
3516
3517** Completion
3518
3519*** New variable `completion-extra-properties' used to specify extra
3520properties of the current completion:
3521- :annotate-function, same as the old completion-annotate-function.
3522- :exit-function, function to call after completion took place.
3523
3524*** Functions on `completion-at-point-functions' can return any of the
3525properties valid for `completion-extra-properties'.
3526
3527*** `completion-annotate-function' is obsolete.
3528
3529*** New `metadata' method for completion tables. The metadata thus returned
3530can specify various details of the data returned by `all-completions':
3531- `category' is the kind of objects returned (e.g., `buffer', `file', ...),
3532 used to select a style in completion-category-overrides.
3533- `annotation-function' to add annotations in *Completions*.
3534- `display-sort-function' to specify how to sort entries in *Completions*.
3535- `cycle-sort-function' to specify how to sort entries when cycling.
3536
3537*** `minibuffer-local-filename-must-match-map' is not used any more.
3538Instead, the bindings in `minibuffer-local-filename-completion-map'
3539are combined with `minibuffer-local-must-match-map'.
3540
3541*** New variable `completing-read-function' allows overriding the
3542behavior of `completing-read'.
3543
3544** `glyphless-char-display' can now distinguish between graphical and
3545text terminal display, via a char-table entry that is a cons cell.
3546
3547** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
3548Instead, the offending function is removed.
3549
3550** New hook types
3551
3552*** New function `run-hook-wrapped' for running an abnormal hook by
3553passing the hook functions as arguments to a "wrapping" function.
3554Like `run-hook-with-args-until-success', it stops at the first
3555non-nil return value.
3556
3557*** New macro `with-wrapper-hook' for running an abnormal hook as a
3558set of "wrapping" filters, similar to around advice.
3559(A version of this macro was actually added in Emacs 23.2 but was not
3560advertised at the time.)
3561
3562** Debugger changes
3563
3564*** New macro `condition-case-unless-debug' (this was actually added in
3565Emacs 23.1 as condition-case-no-debug, but not advertised)
3566
3567*** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
3568
3569*** Variable `stack-trace-on-error' removed.
3570
3571*** The debugger can now "continue" from an error, which means it will
3572jump to the error handler as if the debugger had not been invoked
3573instead of jumping all the way to the top-level.
3574
3575*** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
3576This can be useful when `inhibit-quit' is set.
3577
3578** The new function `server-eval-at' allows evaluation of Lisp forms on
3579named Emacs server instances.
3580
3581** `call-process' and `call-process-region' allow a `(:file "file")' spec
3582to redirect STDOUT to a file.
3583
3584** The function `format-time-string' now supports the %N directive,
3585for higher-resolution time stamps.
3586
3587** New input reading functions
3588
3589*** New function `read-char-choice' reads a restricted set of
3590characters, discarding any inputs not inside the set.
3591
3592*** The command `read-color' now requires a match for a color name
3593or RGB triplet, instead of signaling an error if the user provides
3594invalid input.
3595
3596**** `facemenu-read-color' is now an alias for `read-color'.
3597
3598** `image-library-alist' is renamed to `dynamic-library-alist'.
3599The variable is now used to load all kind of supported dynamic libraries,
3600not just image libraries. The previous name is still available as an
3601obsolete alias.
3602
3603** Syntax parsing changes
3604
3605*** New variable `syntax-propertize-function'.
3606This replaces `font-lock-syntactic-keywords' which is now obsolete.
3607This allows syntax-table properties to be set independently from font-lock:
3608just call syntax-propertize to make sure the text is propertized.
3609Together with this new variable come a new hook
3610syntax-propertize-extend-region-functions, as well as two helper functions:
3611syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
3612as-is; and syntax-propertize-rules which provides a new way to specify
3613syntactic rules.
3614
3615*** Syntax tables support a new "comment style c" additionally to style b.
3616
3617** New hook `post-self-insert-hook', run after `self-insert-command'.
3618
3619** frame-local variables cannot be let-bound any more.
3620
3621** Major and minor mode changes
3622
3623*** `set-auto-mode' now respects mode: local variables at the end of files,
3624as well as those in the -*- line.
3625
3626*** `prog-mode' is a new major mode from which programming modes
3627should be derived.
3628
3629**** `prog-mode-hook' can be used to enable features for programming
3630modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
3631on-the-fly spell checking for comments and strings.
3632
3633*** New hook `change-major-mode-after-body-hook', run by
3634`run-mode-hooks' just before any other mode hooks.
3635
3636*** Enabled globalized minor modes can be disabled in specific major modes.
3637If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
3638major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
3639
3640*** `define-minor-mode' accepts new keywords :variable, :after-hook.
3641
3642** File-handling changes
3643
3644*** `delete-file' and `delete-directory' now accept optional arg TRASH.
3645Trashing is performed if TRASH and `delete-by-moving-to-trash' are
3646both non-nil. Interactively, TRASH defaults to t, unless a prefix
3647argument is supplied (see Trash changes, above).
3648
3649*** New file predicates: `file-equal-p', `file-in-directory-p'.
3650
3651** Tool-bars can display separators.
3652Tool-bar separators are handled like menu separators in menu-bar maps,
3653i.e. via menu entries of the form `(menu-item "--")'.
3654
3655** Image API
3656
3657*** Animated images support (currently animated gifs only).
3658
3659**** `image-animated-p' returns non-nil if an image can be animated.
3660
3661**** `image-animate' animates a supplied image spec.
3662
3663**** `image-animate-timer' returns the timer object for an image that
3664is being animated.
3665
3666*** `image-extension-data' has been renamed to `image-metadata'.
3667The old name is an obsolete alias to the new one.
3668
3669*** Image mode can view any image type that ImageMagick supports.
3670This requires Emacs to be built with ImageMagick support.
3671
3672**** New function `imagemagick-types', defined if ImageMagick support
3673is enabled, returns a list of image file extensions that your
3674ImageMagick installation supports.
3675
3676**** New function `imagemagick-register-types' enables ImageMagick
3677image types in Image mode and in `create-image' and other helper
3678functions.
3679
3680**** New option `imagemagick-types-inhibit' excludes certain
3681ImageMagick image types from `imagemagick-register-types'.
3682
3683**** With ImageMagick support, there are extra Image mode commands to
3684resize and rotate images: `image-transform-fit-to-height',
3685`image-transform-fit-to-width', `image-transform-set-rotation', and
3686`image-transform-set-scale'.
3687
3688** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
3689passes it to the mail user agent function. This argument specifies an
3690action for returning to the caller after finishing with the mail. For
3691example, this is used by Rmail to optionally delete a mail window.
3692
3693** XML and HTML parsing
3694If Emacs is compiled with libxml2 support, there are two new
3695functions: `libxml-parse-html-region' (which parses "real world" HTML)
3696and `libxml-parse-xml-region' (which parses XML). Both return an
3697Emacs Lisp parse tree.
3698
3699** Networking and encryption changes
3700
3701*** `open-network-stream' can now be used to open an encrypted stream.
3702It now accepts an optional `:type' parameter for initiating a TLS
3703connection, directly or via STARTTLS. To do STARTTLS, additional
3704parameters (`:end-of-command', `:success', `:capabilities-command')
3705must also be supplied.
3706
3707*** New library gnutls.el.
3708The new function `gnutls-available-p' returns non-nil if Emacs is
3709built with GnuTLS support. The main entry points are
3710`open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
3711these functions through `open-network-stream', because that can
3712upgrade connections through STARTTLS opportunistically or use plain
3713SSL, depending on your needs. For debugging, set `gnutls-log-level'
3714greater than 0.
3715
3716*** New primitive `secure-hash' that supports many secure hash algorithms:
3717md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
3718sha1.el has been removed. The `sha1' feature is provided by default.
3719
3720** Isearch
3721
3722*** New hook `isearch-update-post-hook' that runs in `isearch-update'.
3723
3724** Progress reporters can now "spin".
3725The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
3726now be nil, or omitted. This makes a "non-numeric" reporter. Each
3727time you call `progress-reporter-update' on that progress reporter,
3728with a nil or omitted VALUE argument, the reporter message is
3729displayed with a "spinning bar".
3730
3731** New variable `revert-buffer-in-progress-p' is true while a buffer is
3732being reverted, even if the buffer has a local `revert-buffer-function'.
3733
3734** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
3735If delayed-warnings-list is non-nil, the command loop calls
3736`delayed-warnings-hook' after `post-command-hook'. At present, this
3737is only used by Emacs on some platforms to display warnings during
3738startup, which might otherwise not be noticed. This uses the
3739functions `display-delayed-warnings' and `collapse-delayed-warnings'.
3740
3741** rx.el has a new `group-n' construct for explicitly numbered groups.
3742
3743** New function `make-composed-keymap' that constructs a new keymap
3744from multiple input maps. You can use this to make a keymap that
3745inherits from multiple maps, eg:
3746 (set-keymap-parent newmap (make-composed-keymap othermap parent))
3747
3748** New function `string-prefix-p'.
3749(This was actually added in Emacs 23.2 but was not advertised at the time.)
3750
3751** New reader macro ## that stands for the empty symbol.
3752This means that the empty symbol can now be read back. Also, #: by itself
3753(when not immediately followed by a possible symbol character) stands for
3754an empty uninterned symbol.
3755
3756** New math functions `isnan', `copysign', `frexp', `ldexp'.
3757
3758** The following functions and variables are obsolete:
3759
3760*** `tooltip-use-echo-area' is obsolete.
3761Rather than setting this to t, disable Tooltip mode instead.
3762
3763*** buffer-substring-filters is obsolete.
3764Use `filter-buffer-substring-functions' instead.
3765
3766*** `byte-compile-disable-print-circle' is obsolete.
3767
3768*** `deferred-action-list' and `deferred-action-function' are obsolete.
3769Use `post-command-hook' instead.
3770
3771*** `font-lock-maximum-size' is obsolete.
3772
3773
3774* Changes in Emacs 24.1 on Non-Free Operating Systems
3775
3776** On MS Windows, Emacs warns when using the obsolete init file _emacs,
3777and also when HOME is set to C:\ by default.
3778
3779** New configure.bat options
3780
3781*** --enable-checking builds Emacs with extra runtime checks.
3782
3783*** --distfiles specifies files to be included in binary distribution.
3784
3785*** --without-gnutls disables automatic GnuTLS detection.
3786
3787*** --lib for general library linkage, works with the USER_LIBS build variable.
3788
3789** New make target `dist' to create binary distribution for MS Windows.
3790
3791** The Lisp function `w32-default-color-map' is now obsolete.
3792(It is only used internally in the Emacs C code.)
3793
3794** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
3795reappear on mouse-over. (Requires OS X 10.6 or later.)
3796
3797** On Mac OS X, dragging a file into Emacs visits the file, like on
3798other platforms, rather than inserting its contents into the buffer.
3799
3800
3801----------------------------------------------------------------------
3802This file is part of GNU Emacs.
3803
3804GNU Emacs is free software: you can redistribute it and/or modify
3805it under the terms of the GNU General Public License as published by
3806the Free Software Foundation, either version 3 of the License, or
3807(at your option) any later version.
3808
3809GNU Emacs is distributed in the hope that it will be useful,
3810but WITHOUT ANY WARRANTY; without even the implied warranty of
3811MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
3812GNU General Public License for more details.
3813
3814You should have received a copy of the GNU General Public License
3815along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
3816
3817
3818Local variables:
3819coding: utf-8
3820mode: outline
3821paragraph-separate: "[ ]*$"
3822end: