GNU Emacs NEWS -- history of user-visible changes.
- Copyright (C) 2010-2014 Free Software Foundation, Inc.
+ Copyright (C) 2014 Free Software Foundation, Inc.
See the end of the file for license conditions.
Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
If possible, use M-x report-emacs-bug.
- This file is about changes in Emacs version 24.
+ This file is about changes in Emacs version 25.
- See files NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
+ See files NEWS.24, NEWS.23, NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18,
and NEWS.1-17 for changes in older Emacs versions.
You can narrow news to a specific version by calling `view-emacs-news'
otherwise leave it unmarked.
\f
- * Installation Changes in Emacs 24.5
+ * Installation Changes in Emacs 25.1
+++
** Building Emacs now requires C99 or later.
** The configure option `--with-pkg-config-prog' has been removed.
Use './configure PKG_CONFIG=/full/name/of/pkg-config' if you need to.
+ ** The configure option '--enable-silent-rules' and the command
+ 'make V=0' now do a better job of suppressing chatter.
+
\f
- * Startup Changes in Emacs 24.5
+ * Startup Changes in Emacs 25.1
\f
- * Changes in Emacs 24.5
+ * Changes in Emacs 25.1
+
+ ** x-select-enable-clipboard is renamed gui-select-enable-clipboard.
+ Additionally it now also applies to OSX and GNUstep.
+
+ +++
+ ** terpri gets an optional arg ENSURE to conditionally output a newline.
+
+ ** `insert-register' now leaves point after the inserted text
+ when called interactively. A prefix argument toggles this behavior.
** New var `truncate-string-ellipsis' to choose how to indicate truncation.
hiding character but the default `.' can be used by let-binding the
variable `read-hide-char'.
+ ** The new functions `string-collate-lessp' and `string-collate-equalp'
+ preserve the collation order as defined by the system's locale(1)
+ environment. For the time being this is implemented for modern POSIX
+ systems and for MS-Windows, for other systems they fall back to their
+ counterparts `string-lessp' and `string-equal'.
+
+ *** The ls-lisp package uses `string-collate-lessp' to sort file names.
+ If you want the old, locale-independent sorting, customize the new
+ option `ls-lisp-use-string-collate' to a nil value.
+
+ *** The MS-Windows specific variable `w32-collate-ignore-punctuation',
+ if set to a non-nil value, causes the above 2 functions to ignore
+ symbol and punctuation characters when collating strings. This
+ emulates the behavior of modern Posix platforms when the locale's
+ codeset is "UTF-8" (as in "en_US.UTF-8"). This is needed because
+ MS-Windows doesn't support UTF-8 as codeset in its locales.
+
+ ** New variable `ns-use-fullscreen-animation' controls animation for
+ non-native NS fullscreen. The default is nil. Set to t to enable
+ animation when entering and leaving fullscreen. For native OSX fullscreen
+ this has no effect.
+
\f
- * Editing Changes in Emacs 24.5
+ * Editing Changes in Emacs 25.1
** Emacs now supports "bracketed paste mode" when running on a terminal
that supports it. This facility allows Emacs to understand pasted
paste experience similar to that under a window system, and significant
performance improvements when pasting large amounts of text.
+** Emacs now supports the latest version of the UBA.
+The Emacs implementation of the Unicode Bidirectional Algorithm (UBA)
+was updated to support all the latest additions and changes introduced
+in Unicode Standard versions 6.3 and 7.0, and a few changes suggested
+for Unicode 8.0. This includes full support for directional isolates
+and the Bidirectional Parentheses Algorithm (BPA) specified by these
+Unicode standards.
+
\f
- * Changes in Specialized Modes and Packages in Emacs 24.5
+ * Changes in Specialized Modes and Packages in Emacs 25.1
+
+ ** ElDoc
+ *** New minor mode global-eldoc-mode
+ *** eldoc-documentation-function now defaults to nil
+
+ ** pcase
+ *** New UPatterns `quote' and `app'.
+ *** New UPatterns can be defined with `pcase-defmacro'.
+ +++
+ *** New vector QPattern.
** Lisp mode
*** Strings after `:documentation' are highlighted as docstrings.
** New font-lock functions font-lock-ensure and font-lock-flush, which
should be used instead of font-lock-fontify-buffer when called from Elisp.
+ ** Macro `minibuffer-with-setup-hook' takes (:append FUN) to mean
+ appending FUN to `minibuffer-setup-hook'.
+
+ ** cl-lib
+ *** New functions cl-fresh-line, cl-digit-char-p and cl-parse-integer.
+
** Calendar and diary
+++
`diary-chinese-insert-monthly-entry', `diary-chinese-insert-yearly-entry'.
+++
- *** Calendar can list and mark diary entries with Chinese dates.
+ *** The calendar can now list and mark diary entries with Chinese dates.
See `diary-chinese-list-entries' and `diary-chinese-mark-entries'.
+ ---
+ *** The option `calendar-mode-line-format' can now be nil,
+ which means to do nothing special with the mode line in calendars.
+
+ ---
+ *** Many items obsolete since at least version 23.1 have been removed.
+ The majority were function/variable/face aliases, too numerous to list here.
+ The remainder were:
+
+ **** Functions `calendar-one-frame-setup', `calendar-only-one-frame-setup',
+ `calendar-two-frame-setup', `european-calendar', `american-calendar'.
+
+ **** Hooks `cal-menu-load-hook', `cal-x-load-hook'.
+
+ **** Macro `calendar-for-loop'.
+
+ **** Variables `european-calendar-style', `diary-face', `hebrew-holidays-{1,4}'.
+
+ **** The nil and list forms of `diary-display-function'.
+
** New ERT function `ert-summarize-tests-batch-and-exit'.
+ ---
+ ** `Info-fontify-maximum-menu-size' can be t for no limit.
+
+ ---
+ ** ntlm.el has support for NTLM2.
+
---
** The Rmail commands d, C-d and u now handle repeat counts to delete or
undelete multiple messages.
+ ** Rmail can now render HTML mail messages if your Emacs was built with
+ libxml2 or if you have the Lynx browser installed. By default, Rmail
+ will display the HTML version of a mail message that has both HTML and
+ plain text parts, if display of HTML email is possible; customize the
+ `rmail-mime-prefer-html' option to `nil' if you don't want that.
+
** SES now supports local printer functions; see `ses-define-local-printer'.
** In sh-mode, you can now use `sh-shell' as a file-local variable to
*** New connection method "nc", which allows to access dumb busyboxes.
+ ** SQL mode
+
+ *** New user variable `sql-default-directory' enables remote
+ connections using Tramp.
+
+ *** New command `sql-send-line-and-next' sends the current line to the
+ interactive buffer and advances to the next line, skipping whitespace
+ and comments.
+
+ *** Add support for Vertica SQL.
+
** VC and related modes
*** New option `vc-annotate-background-mode' controls whether
*** New custom variable `hide-ifdef-exclude-define-regexp' to define symbol
name patterns (e.x. all "FOR_DOXYGEN_ONLY_*") to be excluded.
+ ** TeX mode
+
+ *** New custom variable `tex-print-file-extension' to help users who
+ use PDF instead of DVI.
+
** Obsolete packages
---
*** vi.el, vip.el (try M-x viper instead)
\f
- * New Modes and Packages in Emacs 24.5
+ * New Modes and Packages in Emacs 25.1
\f
- * Incompatible Lisp Changes in Emacs 24.5
+ * Incompatible Lisp Changes in Emacs 25.1
** window-configurations no longer record the buffers's marks.
any reference to a buffer position. The 6th member of the mouse
position list returned for such events is now nil.
+ ** Menu items in keymaps do not support the "key shortcut cache" any more.
+ These slots used to hold key-shortcut data, but have been obsolete since
+ Emacs-21.
\f
- * Lisp Changes in Emacs 24.5
+ * Lisp Changes in Emacs 25.1
+
+ ** Some "x-*" were obsoleted:
+ *** x-select-text is renamed gui-select-text.
+ *** x-selection-value is renamed gui-selection-value.
+ *** x-get-selection is renamed gui-get-selection.
+ *** x-get-clipboard and x-clipboard-yank are marked obsolete.
+ *** x-get-selection-value is renamed to gui-get-primary-selection.
+ *** x-set-selection is renamed to gui-set-selection
+
+ ** call-process-shell-command and process-file-shell-command
+ don't take "&rest args" any more.
+
+ ** New function `alist-get', which is also a valid place (aka lvalue).
** New function `funcall-interactively', which works like `funcall'
but makes `called-interactively-p' treat the function as (you guessed it)
** Functions `rmail-delete-forward' and `rmail-delete-backward' take an
optional repeat-count argument.
+ ** Function `sort' can deal with vectors.
+
---
** New utilities in subr-x.el:
*** New macros `if-let' and `when-let' allow defining bindings and to
as the first or last argument of subsequent forms.
\f
- * Changes in Emacs 24.5 on Non-Free Operating Systems
+ * Changes in Frames and Windows Code in Emacs 25.1
+
+ +++
+ ** Emacs can now draw horizontal scroll bars on some platforms that
+ provide toolkit scroll bars, namely Gtk+, Lucid, Motif and Windows.
+ Horizontal scroll bars are turned off by default.
+ *** New function `horizontal-scroll-bars-available-p' telling whether
+ horizontal scroll bars are available on the underlying system.
+ *** New mode `horizontal-scroll-bar-mode' to toggle horizontal scroll
+ bars on all existing and future frames.
+ *** New function `toggle-horizontal-scroll-bar' to toggle horizontal
+ scroll bars on the selected frame.
+ *** New frame parameters `horizontal-scroll-bars' and
+ `scroll-bar-height' to set horizontal scroll bars and their height
+ for individual frames and in `default-frame-alist'.
+ *** New functions `frame-scroll-bar-height' and
+ `window-scroll-bar-height' return the height of horizontal scroll
+ bars on a specific frame or window.
+ *** `set-window-scroll-bars' now accepts five parameters where the last
+ two specify height and type of the window's horizontal scroll bar.
+ *** `window-scroll-bars' now returns type and sizes of horizontal scroll
+ bars too.
+ *** New buffer-local variables `horizontal-scroll-bar' and
+ `scroll-bar-height'.
+
+ ** The height of a frame's menu and tool bar are no more counted in the
+ frame's text height. This means that the text height stands only for
+ the height of the frame's root window plus that of the echo area (if
+ present). This was already the behavior for frames with external tool
+ and menu bars (like in the Gtk builds) but has now been extended to all
+ builds.
+
+ ** Frames now do not necessarily preserve the number of columns or lines
+ they display when setting default font, menu bar, fringe width, or
+ scroll bars. In particular, maximized and fullscreen frames are
+ conceptually never resized if such settings change. For fullheight and
+ fullwidth frames, the behavior may depend on the toolkit used.
+ *** New option `frame-inhibit-implied-resize' if non-nil, means that
+ setting default font, menu bar, fringe width, or scroll bars of a
+ specific frame does not resize that frame in order to preserve the
+ number of columns or lines it displays.
+
+ \f
+ * Changes in Emacs 25.1 on Non-Free Operating Systems
---
** Building Emacs for MS-Windows requires at least Windows XP
or Windows Server 2003. The built binaries still run on all versions
of Windows starting with Windows 9X.
- \f
- * Installation Changes in Emacs 24.4
-
- ** Emacs can now be compiled with ACL (access control list) support.
- This happens by default if a suitable support library is found at
- build time, like libacl on GNU/Linux. To prevent this, use the
- configure option `--disable-acl'. See below for the features this provides.
-
- ** Emacs can now be compiled with file notification support.
- This happens by default if a suitable system library is found at
- build time. To prevent this, use the configure option
- `--without-file-notification'. See below for file-notify features.
- This feature is not available for the Nextstep port.
-
- ** Emacs can now be compiled with zlib support.
- This happens by default if zlib is present, which it normally is.
- To prevent this, use the configure option `--without-zlib'.
- This provides the function `zlib-decompress-region'; see below for details.
-
- ** The configure option `--without-compress-info' has been generalized,
- and renamed to `--without-compress-install'. It now prevents compression
- of _any_ files during installation.
-
- ** The configure option `--with-crt-dir' has been removed.
- It is no longer needed, as the crt*.o files are no longer linked specially.
-
- ** Directories passed to configure option `--enable-locallisppath' are
- no longer created during installation.
-
- ** Emacs for Nextstep (Mac OS X, GNUstep) can be built with ImageMagick support.
- This requires pkg-config to be available at build time.
-
- \f
- * Startup Changes in Emacs 24.4
-
- ** When initializing `load-path', an empty element in the EMACSLOADPATH
- environment variable (either leading, e.g., ":/foo"; trailing, e.g.,
- "/foo:"; or embedded, e.g., "/foo::/bar") is replaced with the default
- load-path (the one that would have been used if EMACSLOADPATH was unset).
- This makes it easier to _extend_ the load-path via EMACSLOADPATH
- (previously, EMACSLOADPATH had to specify the complete load-path,
- including the defaults). (In older versions of Emacs, an empty element
- was replaced by ".", so use an explicit "." now if that is what you want.)
-
- ** The -L option, which normally prepends its argument to load-path,
- will instead append, if the argument begins with `:' (or `;' on MS Windows;
- i.e., `path-separator').
-
- ** If you use either site-load.el or site-init.el to customize the dumped
- Emacs executable, any changes to `load-path' that these files make
- will no longer be present after dumping. To affect a permanent change
- to `load-path', use the `--enable-locallisppath' option of `configure'.
-
- ** The user option `initial-buffer-choice' can now specify a function
- to set up the initial buffer.
-
- \f
- * Changes in Emacs 24.4
-
- ** Support for ACLs (access control lists).
- This requires a suitable support library to be found at build time.
- On GNU/Linux, the POSIX ACL interface is used via libacl.
- On MS-Windows, the NT Security APIs are used to emulate the POSIX interface.
- ACLs are extended file attributes, used e.g. for finer-grained permissions.
-
- *** Emacs preserves the ACL entries of files when backing up.
-
- *** New functions `file-acl' and `set-file-acl' get and set file ACLs.
-
- ** Support for menus on text-mode terminals.
- If the terminal supports a mouse, clicking on the menu bar, or on
- sensitive portions of the mode line or header line, will drop down the
- menu defined at that position. Likewise, clicking C-mouse-1, C-mouse-2, or
- C-mouse-3 on the text area will pop up the menus defined for those locations.
-
- If the text terminal does not support a mouse, you can activate the
- first menu-bar menu by typing F10, which invokes `menu-bar-open'.
-
- If you want the previous behavior, where F10 invoked `tmm-menubar',
- customize the option `tty-menu-open-use-tmm' to a non-nil value.
- (Typing M-` always invokes `tmm-menubar', even if `tty-menu-open-use-tmm'
- is nil.)
-
- ** New option `load-prefer-newer' affects how the `load' function chooses
- the file to load. If this is non-nil, then when both .el and .elc
- versions of a file exist, and the caller did not explicitly specify
- which one to load, then the newer file is loaded. The default, nil,
- means to always load the .elc file.
-
- ** Multi-monitor support
-
- *** New functions `display-monitor-attributes-list' and
- `frame-monitor-attributes' can be used to obtain information about
- each physical monitor on multi-monitor setups.
-
- *** The functions `display-pixel-width' and `display-pixel-height' now
- behave consistently among the platforms: they return the pixel width
- or height for all physical monitors associated with the given display
- as if they were on X. To get information for each physical
- monitor, use the new functions above. Similar notes also apply to
- `x-display-pixel-width', `x-display-pixel-height', `display-mm-width',
- `display-mm-height', `x-display-mm-width', and `x-display-mm-height'.
-
- ** New function `zlib-decompress-region', which decompresses gzip- and
- zlib-format compressed data using built-in zlib support (if available).
-
- ** The *Messages* buffer is created in `messages-buffer-mode',
- a new major mode, with read-only status. Any code that might create
- the *Messages* buffer should call the function `messages-buffer' to do
- so and set up the mode.
-
- ** The cursor stops blinking after 10 blinks (by default) on X and Nextstep.
- You can change the default by customizing `blink-cursor-blinks'.
-
- ** In keymaps where SPC scrolls forward, S-SPC now scrolls backward.
- This affects View mode, etc.
-
- ** The default value of `make-backup-file-name-function' is no longer nil.
- Instead it defaults to a function that does what the nil value used to.
-
- ** Help
-
- *** The command `apropos-variable' is renamed to `apropos-user-option'.
- `apropos-user-option' shows all user options, while `apropos-variable'
- shows all variables. When called with a universal prefix argument,
- the two commands swap their behaviors. When `apropos-do-all' is
- non-nil, they output the same results.
-
- *** The key `?' now describes prefix bindings, like `C-h'.
-
- *** The command `describe-function' has been extended for EIEIO.
- Running it on constructors will show a full description of the
- generated class. For generic functions, it will show all
- implementations together with links to the source. The old commands
- `describe-class', `describe-constructor' and `describe-generic' were
- removed.
-
- *** The function `quail-help' is no longer an interactive command.
- Use `C-h C-\' (`describe-input-method') instead.
-
- ** Frame and window handling
-
- *** New commands `toggle-frame-fullscreen' and `toggle-frame-maximized',
- bound to <f11> and M-<f10>, respectively.
-
- *** New hooks `focus-in-hook', `focus-out-hook'.
- These are normal hooks run when an Emacs frame gains or loses input focus.
-
- *** The function `window-in-direction' now takes additional arguments
- for specifying a reference point, wrapping the selection around frame
- borders, and specifying ways to select the minibuffer window.
-
- *** Emacs can now change frame sizes in units of pixels, rather than
- text rows or columns. When maximizing a frame or making it fullscreen,
- remaining extra pixels are no longer given to the minibuffer, the rightmost
- fringe, or other unusable space, but are distributed among the text
- areas of the frame's windows. If the new option `frame-resize-pixelwise'
- is non-nil, all frame size changes happen pixelwise and set the
- corresponding size hints for the window manager.
-
- *** Emacs can now change window sizes in units of pixels.
- Mouse-dragging a mode line or window divider now changes the size of
- adjacent windows pixelwise. If the new option `window-resize-pixelwise'
- is non-nil, functions like `balance-windows-area' and `fit-window-to-buffer'
- resize windows pixelwise. Most functions for changing or accessing
- window sizes now have an additional argument that allows changes to apply,
- or values to be returned, in pixels instead of lines/columns.
-
- *** The functions `window-body-height' and `window-body-width' now never
- count partially visible lines or columns if called with a nil PIXELWISE
- argument.
-
- *** Emacs can now draw dividers between adjacent windows. To put
- dividers between side-by-side/vertically stacked windows customize the
- frame parameters `right-divider-width' and `bottom-divider-width' to
- some positive integer. You can drag dividers with the mouse (they show
- a corresponding cursor when the mouse hovers over them). You can change
- the appearance of dividers by customizing the faces `window-divider',
- `window-divider-first-pixel', and `window-divider-last-pixel'. The last
- two are useful to provide a 3D effect, or to better distinguish dividers
- from surrounding display objects.
-
- *** New functions to return the pixel sizes of window components, namely
- `window-scroll-bar-width', `window-mode-line-height',
- `window-header-line-height', `window-right-divider-width', and
- `window-bottom-divider-width'.
-
- *** The new function `window-text-pixel-size' returns the size of the
- text of a window's buffer in pixels. This allows functions like
- `fit-frame-to-buffer' and `fit-window-to-buffer' to accurately fit a
- window to its buffer as it will be displayed.
-
- *** `fit-window-to-buffer' can now resize windows in both dimensions.
- This behavior is controlled by the new option
- `fit-window-to-buffer-horizontally'. The new option
- `fit-frame-to-buffer' allows you to fit the window's frame to its buffer.
-
- *** `fit-frame-to-buffer' now fits frames in both dimensions. The new
- options `fit-frame-to-buffer-margins' and `fit-frame-to-buffer-sizes'
- control the size of the frame and its position on screen.
-
- *** Temp Buffer Resize Mode can now adjust the height and width of
- windows and frames. The new option `temp-buffer-max-width' allows you to
- control the width of temporary buffer windows. Moreover, if the new
- option `fit-frame-to-buffer' is non-nil and the buffer appears in the
- root window of a frame, Temp Buffer Resize Mode will try to adjust the
- width and/or height of the frame.
-
- *** `split-window' is now a non-interactive function, not a command.
- As a command, it was a special case of `C-x 2' (`split-window-below'),
- and as such superfluous. After being reimplemented in Lisp, its
- interactive form was mistakenly retained.
-
- *** The functions `window-size' and `window-total-size' now have an
- optional argument to return a rounded size value.
-
- *** `window-state-put' now allows you to put a window state into internal
- windows too.
-
- *** New option `scroll-bar-adjust-thumb-portion'.
- Available only on X, this option allows you to control over-scrolling
- using the scroll bar (i.e., dragging the thumb down even when the end
- of the buffer is visible).
-
- *** New display actions functions for `display-buffer':
-
- **** `display-buffer-in-previous-window' displays a buffer in a window
- previously showing that buffer.
-
- **** `display-buffer-at-bottom' chooses or creates a window at the
- bottom of the selected frame.
-
- **** `display-buffer-no-window' to not display the buffer in a window.
-
- *** New display action alist entry `allow-no-window' to indicate the
- caller of `display-buffer' is ready to handle the case of not displaying
- the buffer in a window.
-
- ** Lisp evaluation
-
- *** `eval-defun' on an already defined defcustom calls the :set function,
- if there is one.
-
- *** The commands `eval-expression' (`M-:'), `eval-last-sexp' (`C-x C-e'),
- and `eval-print-last-sexp' (`C-j' in Lisp Interaction mode) can take a
- zero prefix argument. This disables truncation of lists in the output,
- equivalent to setting `(eval-expression-)print-length' and
- `(eval-expression-)print-level' to nil. Additionally, it causes integers
- to be printed in other formats (octal, hexadecimal, and character).
-
- *** New hook `eval-expression-minibuffer-setup-hook' run by
- `eval-expression' on entering the minibuffer.
-
- ** `cache-long-line-scans' is now non-nil, and renamed to `cache-long-scans',
- because it affects caching of paragraph scanning results as well.
- There is no reason to set this to nil except for debugging purposes.
-
- ** `emacs-bzr-version' has been renamed to `emacs-repository-version',
- and works for git too, if you fetch the repository notes.
-
- ** The default value of `comment-use-global-state' is now t,
- and this variable has been marked obsolete.
-
- ** `write-region-inhibit-fsync' now defaults to t in batch mode.
-
- ** The option `set-mark-default-inactive' has been deleted.
- This unfinished feature was introduced by accident in Emacs 23.1;
- simply disabling Transient Mark mode does the same thing.
-
- \f
- * Editing Changes in Emacs 24.4
-
- ** Indentation
-
- *** `electric-indent-mode' is now enabled by default.
- Typing RET reindents the current line and indents the new line.
- `C-j' inserts a newline but does not indent. In some programming modes,
- additional characters are electric (eg `{').
-
- *** New buffer-local `electric-indent-local-mode'.
-
- *** The behavior of `C-x TAB' (`indent-rigidly') has changed.
- When invoked without a prefix argument, it now activates a transient
- mode in which typing <left>, <right>, <S-left>, and <S-right> adjusts
- the text indentation in the region. Typing any other key resumes
- normal editing behavior.
-
- *** `tab-stop-list' is now implicitly extended to infinity by repeating
- the last step. Its default value is changed to nil, which means a tab
- stop every `tab-width' columns.
-
- ** Uniquify is enabled by default, with `post-forward-angle-brackets' style.
- In other words, if you visit two files that have the same base name,
- then rather than creating buffers basename and basename<2>,
- Emacs uses basename<dirA> and basename<dirB>. To change this,
- customize `uniquify-buffer-name-style'. Set it to nil for the old behavior.
-
- ** New command `C-x SPC' (`rectangle-mark-mode') makes a rectangular region.
- Most commands are still unaware of it, but kill/yank do work on the rectangle.
-
- ** New option `visual-order-cursor-movement'.
- If this is non-nil, cursor motion with arrow keys will follow the
- visual order of characters on the screen: <left> always moves to the
- left, <right> always moves to the right, disregarding the surrounding
- bidirectional context.
-
- ** New command `delete-duplicate-lines'.
- This searches the region for identical lines, and removes all but one
- copy of each repeated line. The lines need not be sorted.
-
- ** New command `cycle-spacing' acts like a smarter `just-one-space'.
- When called in succession, it cycles between spacing conventions:
- one space, no spaces, original spacing.
-
- ** `blink-matching-paren' now only highlights the matching open-paren
- by default, instead of moving the cursor. Set this variable to `jump' to
- restore the old behavior.
-
- ** The new function `fill-single-char-nobreak-p' can stop fill from breaking
- a line after a one-letter word, which is an error in some typographical
- conventions. To use it, add it to the `fill-nobreak-predicate' hook.
-
- ** Registers
-
- *** All interactive commands that read a register (`copy-to-register', etc.)
- now display a temporary window after `register-preview-delay' seconds
- that summarizes existing registers. To disable this, set that option to nil.
- Interactive commands that read registers and want to make use of this
- should use `register-read-with-preview' to read register names.
-
- *** New command `frameset-to-register' bound to `C-x r f', replacing
- `frame-configuration-to-register'. It offers similar functionality,
- plus enhancements like the ability to restore deleted frames.
- (`frame-configuration-to-register' still exists, but no longer has a
- key binding.)
-
- *** New command `C-x C-k x' (`kmacro-to-register') stores keyboard
- macros in registers.
-
- \f
- * Changes in Specialized Modes and Packages in Emacs 24.4
-
- ** Backtrace and debugger
-
- *** New Lisp debugger command `v' (`debugger-toggle-locals') toggles the
- display of local variables of the current stack frame.
-
- *** The Lisp debugger's `e' command (`debugger-eval-expression') now includes
- the lexical environment when evaluating the code in the context at point
- (and so allows you to access lexical variables).
-
- *** New minor mode `jit-lock-debug-mode' helps you debug code run via JIT Lock.
-
- ** Battery information can now be retrieved from BSD's `apm' utility.
-
- ** In the Buffer Menu, `M-s a C-o' shows matches for a regexp in marked buffers.
-
- ** Calc
-
- *** Calc by default now uses the Gregorian calendar for all dates, and
- uses January 1, 1 AD as its day number 1. Previously Calc used the
- Julian calendar for dates before September 14, 1752, and it used
- December 31, 1 BC as its day number 1; the new scheme is more
- consistent with Calendar's calendrical system and day numbering.
-
- *** The new option `calc-gregorian-switch' lets you configure if
- (and when) Calc switches from the Julian to the Gregorian calendar.
-
- *** Support for ISO 8601 dates.
-
- ** Calendar and Diary
-
- *** New faces `calendar-weekday-header', `calendar-weekend-header',
- and `calendar-month-header'.
-
- *** New option `calendar-day-header-array'.
-
- *** New variable `diary-from-outlook-function', used by the command
- `diary-from-outlook'.
-
- *** The variable `calendar-font-lock-keywords' is obsolete.
-
- ** CEDET
-
- *** EDE
-
- **** The cpp-root project now supports executing a compile command.
- It can be set through the new :compile-command slot or the
- buffer-local variable `compile-command'.
-
- **** Better selection of include directories for the 'linux' project.
- Include directories now support out-of-tree build directories and
- target architecture auto-detection.
-
- *** Semantic
-
- **** Improved detection of used namespaces in current scope in C++.
-
- **** Parsing of default values for variables and function arguments in C/C++.
- They are also displayed by the summarize feature in the mode line.
-
- **** Improved parsing of function pointers in C/C++.
- This also includes parsing of function pointers as function arguments.
-
- **** Parsing of C/C++ preprocessor macros that open new scope.
- For example, this enables parsing of macros that open new namespaces.
-
- **** Support for 'this' pointer in inline member functions in C++.
-
- ** CFEngine mode
-
- *** Support for completion, ElDoc, and Flycheck has been added.
-
- *** The current CFEngine syntax is parsed from "cf-promises -s json".
- There is a fallback syntax available if you don't have cf-promises or
- if your version doesn't support that option. See option `cfengine-cf-promises'.
-
- ** cl-lib
-
- *** New macro `cl-tagbody'.
- This executes statements while allowing for control transfer to labels.
-
- *** letf is now just an alias for cl-letf.
-
- ** CUA mode
-
- *** CUA mode now uses `delete-selection-mode' and `shift-select-mode'.
- Hence, you can now enable it independently from those modes, and from
- `transient-mark-mode'.
-
- *** `cua-highlight-region-shift-only' is now obsolete.
- You can disable `transient-mark-mode' to get the same result.
-
- *** CUA's rectangles can now be used without CUA by calling the command
- `cua-rectangle-mark-mode'.
-
- ** Delete Selection mode can now be used without Transient Mark mode.
-
- ** Desktop
-
- *** `desktop-save-mode' by default now auto-saves an existing desktop file
- after `desktop-auto-save-timeout'. To disable this, customize that option
- to nil (or zero).
-
- *** Desktop now saves and restores the frame/window configuration.
- To disable this, set `desktop-restore-frames' to nil.
- See also related options `desktop-restore-reuses-frames',
- `desktop-restore-in-current-display', and `desktop-restore-forces-onscreen'.
-
- ** New Dired minor mode `dired-hide-details-mode' toggles whether details,
- such as file ownership or permissions, are visible in Dired buffers.
- See the new options `dired-hide-details-hide-symlink-targets' and
- `dired-hide-details-hide-information-lines' for customizing what to hide.
-
- ** You can enable ElDoc inside the `eval-expression' minibuffer with:
- (add-hook 'eval-expression-minibuffer-setup-hook 'eldoc-mode)
- The results display in the mode line.
-
- ** Electric Pair mode
-
- *** New option `electric-pair-preserve-balance', enabled by default.
- If non-nil, pairing/skipping only kicks in when that help the balance
- of parentheses and quotes; i.e., the buffer should end up at least as
- balanced as before.
-
- You can further control this behavior by adjusting the predicates
- stored in `electric-pair-inhibit-predicate' and `electric-pair-skip-self'.
-
- *** New option `electric-pair-delete-adjacent-pairs', enabled by default.
- In `electric-pair-mode', the commands `backward-delete-char' and
- `backward-delete-char-untabify' are now bound to electric variants
- that delete the closer when invoked between adjacent pairs.
-
- *** New option `electric-pair-open-newline-between-pairs', enabled by default.
- In `electric-pair-mode', inserting a newline between adjacent pairs
- opens an extra newline after point, which is indented if
- `electric-indent-mode' is also set.
-
- *** New option `electric-pair-skip-whitespace', enabled by default.
- This controls if skipping over closing delimiters should jump over any
- whitespace slack. Setting it to `chomp' makes it delete this
- whitespace. See also the variable `electric-pair-skip-whitespace-chars'.
-
- *** New variables control the pairing in strings and comments.
- You can customize `electric-pair-text-pairs' and
- `electric-pair-text-syntax-table' to tweak pairing behavior inside
- strings and comments.
-
- ** New EPA option `epa-mail-aliases'.
- You can set this to a list of email address aliases that `epa-mail-encrypt'
- should use to find keys.
-
- ** New ERC option `erc-accidental-paste-threshold-seconds'.
- If set to a number, this can be used to avoid accidentally pasting large
- amounts of data into the ERC input.
-
- ** New ERT macro `skip-unless' allows skipping ERT tests.
-
- ** Eshell
-
- *** `eshell' now supports visual subcommands and options.
- Eshell has been able to handle "visual" commands (interactive,
- non-line oriented commands such as top that require display
- capabilities not provided by eshell) by running them in an Emacs
- terminal emulator. See `eshell-visual-commands'.
-
- This feature has been extended to subcommands and options that make a
- usually line-oriented command a visual command. Typical examples are
- "git log" and "git <command> --help", which display their output in a
- pager by default. See `eshell-visual-subcommands' and `eshell-visual-options'.
-
- *** New Eshell-Tramp module.
- External su and sudo commands are now the default; the internal,
- Tramp-using variants can still be used by enabling the eshell-tramp module.
-
- ** New F90 mode option `f90-smart-end-names'.
-
- ** New option `gnutls-verify-error', if non-nil, means that Emacs
- should reject SSL/TLS certificates that GnuTLS determines as invalid.
- (This option defaults to nil at present, but this is expected to change
- in a future release.)
-
- ** Hi-Lock
-
- *** New global command `M-s h .' (`highlight-symbol-at-point') highlights
- the symbol near point.
-
- *** New option `hi-lock-auto-select-face'. When non-nil, hi-lock commands
- will cycle through faces in `hi-lock-face-defaults' without prompting.
-
- ** Icomplete is now more similar to Ido.
-
- *** Icomplete by default now applies to all forms of minibuffer completion.
- The variable `icomplete-with-completion-tables' (now a user option)
- controls this. To restore the old behavior, set it back to
- '(internal-complete-buffer).
-
- *** You can navigate through and select completions using the keys
- from `icomplete-minibuffer-map'.
-
- *** The string that separates potential completions is now a customizable
- option (`icomplete-separator'). The default is " | " rather than ",".
-
- *** New face `icomplete-first-match'; and new options
- `icomplete-hide-common-prefix' and `icomplete-show-matches-on-no-input'.
-
- *** The option `icomplete-show-key-bindings' has been removed.
-
- ** Ido
-
- *** An Ido user manual is now included.
-
- *** The option `ido-use-virtual-buffers' can now take the value `auto'.
- This means to use virtual buffers if the current ido input does not match
- an existing buffer.
-
- *** The variable `ido-decorations' can optionally have two new elements,
- which are the brackets to use around the sole remaining completion.
-
- ** Image mode
-
- *** New commands `n' (`image-next-file') and `p' (`image-previous-file')
- visit the next image file and the previous image file in the same
- directory, respectively.
-
- *** New commands to show specific frames of multi-frame images.
- `f' (`image-next-frame') and `b' (`image-previous-frame') visit the
- next or previous frame. `F' (`image-goto-frame') shows a specific frame.
-
- *** New commands to speed up, slow down, or reverse animation.
- `a +' (`image-increase-speed') and `a -' (`image-decrease-speed') to
- speed up and slow down the animation. `a r' (`image-reverse-speed')
- to reverse it and `a 0' (`image-reset-speed') to reset it.
-
- *** The command `image-mode-fit-frame' deletes other windows.
- When toggling, it restores the frame's previous window configuration.
- It also has an optional frame argument, which can be used by Lisp
- callers to fit the image to a frame other than the selected frame.
-
- ** New Imenu option `imenu-generic-skip-comments-and-strings'.
-
- ** Info
-
- *** New Info face `info-index-match', used to highlight matches in index
- entries displayed by `Info-index-next', `Info-virtual-index' and
- `info-apropos'.
-
- *** The Info-edit command is obsolete. Editing Info nodes by hand
- has not been relevant for some time.
-
- ** JS Mode
-
- *** New option `js-switch-indent-offset'.
-
- *** Better indentation of multiple-variable declarations.
- If a declaration spans several lines, variables on the following lines
- are lined up to the first one.
-
- *** Recognition and better indentation of continuations in array comprehensions.
-
- ** MH-E has been updated to version 8.5 - see separate MH-E-NEWS file.
-
- ** Octave mode
-
- *** Font locking for Texinfo comments and new keywords.
-
- *** Completion in Octave file buffers.
-
- *** ElDoc support.
-
- *** Jump to definition.
-
- *** Documentation lookup/search.
-
- ** OPascal mode is the new name for Delphi mode
-
- *** All delphi-* variables and functions have been renamed to opascal-*.
- Obsolete aliases exist for those likely to have been used externally.
-
- *** The option `delphi-newline-always-indents' has been removed.
- Use `electric-indent-mode' instead.
-
- *** The TAB key runs the standard `indent-for-tab-command', not `delphi-tab'.
-
- ** Package
-
- *** The package library now supports digital signing of packages.
- Maintainers of package archives should consider signing their packages
- to enhance security.
-
- **** If the user option `package-check-signature' is non-nil,
- Emacs tries to check package signatures at install time.
- The value `allow-unsigned' allows installation of unsigned packages.
-
- **** The user option `package-unsigned-archives' lists archives where
- Emacs will not try to check signatures.
-
- *** New option `package-pinned-packages'. This is useful if you have multiple
- archives enabled, with more than one offering a given package that you want.
-
- *** In the `list-packages' buffer, you can use `f' (`package-menu-filter')
- to filter the list of packages by a keyword.
-
- *** In the `describe-package' buffer, there are now buttons listing the
- keywords related to the package. Click on a button to see other packages
- related to that keyword.
-
- *** The format of `archive-contents' files, generated by package
- repositories, has changed to allow a new (fifth) element in the data
- vectors, containing an associative list with extra properties.
- (For example, `describe-package' uses the `:url' extra property to
- display a "Homepage" header.)
-
- ** In Prolog mode, `prolog-use-smie' has been removed,
- along with the non-SMIE indentation code.
-
- ** Python mode
-
- *** Out of the box support for CPython, iPython and readline based shells.
- **** `python-shell-completion-module-string-code' is no longer used.
-
- *** Automatic shell prompt detection. New user options:
- **** `python-shell-interpreter-interactive-arg'.
- **** `python-shell-prompt-detect-enabled'.
- **** `python-shell-prompt-detect-failure-warning'.
- **** `python-shell-prompt-input-regexps'.
- **** `python-shell-prompt-output-regexps'.
-
- *** Python shell support for remote hosts via tramp.
-
- *** Correct display of line numbers for code sent to the Python shell.
-
- ** Remember
-
- *** The new command `remember-notes' creates a buffer that is saved on exit.
- You can use it as a more permanent *scratch* buffer.
-
- *** Remember can now store notes in separate files.
- To use this, add `remember-store-in-files' to the `remember-handler-functions'
- option. The files are saved in `remember-data-directory' using
- names specified by `remember-directory-file-name-format'.
-
- ** Rmail
-
- *** Customize `rmail-mbox-format' to influence some minor aspects of
- how Rmail displays non-MIME messages.
-
- *** The `unrmail' command now converts from BABYL to mboxrd format,
- rather than mboxo. Customize `unrmail-mbox-format' to change this.
-
- ** Ruby mode
-
- *** Improved syntax highlighting and indentation.
-
- *** New `electric-indent-mode' integration.
-
- *** New option `ruby-encoding-magic-comment-style'.
-
- *** New option `ruby-custom-encoding-magic-comment-template'.
-
- *** New option `ruby-align-to-stmt-keywords'.
-
- *** New option `ruby-align-chained-calls'.
-
- *** More Ruby file types have been added to `auto-mode-alist'.
-
- ** Search and Replace
-
- *** New global command `M-s .' (`isearch-forward-symbol-at-point')
- starts a symbol (identifier) incremental search forward with the
- symbol found near point added to the search string initially.
-
- *** `C-x 8 RET' in Isearch mode reads a character by its Unicode name
- and adds it to the search string.
-
- *** `M-s i' in Isearch mode toggles whether search matches invisible text.
-
- *** `query-replace' skips invisible text when `search-invisible' is nil,
- and opens overlays with hidden text when `search-invisible' is `open'.
-
- *** A negative prefix argument of replacement commands replaces backward.
- `M-- M-%' replaces a string backward, `M-- C-M-%' replaces a regexp
- backward, `M-s w words M-- M-%' replaces a sequence of words backward.
-
- *** By default, prefix arguments do not now terminate Isearch mode.
- Set `isearch-allow-prefix' to nil to restore the old behavior.
-
- *** More Isearch commands accept prefix arguments, namely
- `isearch-printing-char', `isearch-quote-char', `isearch-yank-word',
- `isearch-yank-line'.
-
- *** Word search now matches whitespace at the beginning/end
- of the search string if it contains leading/trailing whitespace.
- In an incremental word search or when using a non-nil LAX argument
- of `word-search-regexp', the lax matching can also match part of
- the first word (in addition to the lax matching of the last word).
- The same rules are now applied to the symbol search, with the difference
- that it matches symbols, and non-symbol characters between symbols.
-
- ** New SES command `ses-rename-cell' allows assignment of names to SES cells.
-
- ** The shell.el option `explicit-bash-args' includes --noediting by default.
- All non-ancient Bash versions support this option.
-
- ** Shell Script mode
-
- *** The SMIE indentation engine is now used by default - see `sh-use-smie'.
-
- *** `sh-mode' now has its own setting for `add-log-current-defun-function'.
-
- ** SMIE
-
- *** You can customize the SMIE indentation of a mode via `smie-config'.
- The command `smie-config-guess' can help you derive the appropriate
- indentation settings, if you provide it with an indented sample file.
- Use `smie-config-save' to save the result.
-
- *** You can customize the SMIE indentation of a file by adding an entry to
- the file's local variables of the form: `eval: (smie-config-local '(RULES))'.
-
- *** New commands `smie-config-show-indent' and `smie-config-set-indent'.
-
- ** SQL mode
-
- *** Improved login monitoring and appropriate response to login failures.
- New variable `sql-login-delay' defines maximum wait time for a connection.
-
- *** Oracle support.
- SQL*Plus script placeholders are properly highlighted and identified
- in `sql-placeholders-filter'. When starting SQL*Plus, `sql-oracle-options'
- are passed before the logon parameter, as required. The default now
- includes `-L', to limit the number of logon attempts per invocation.
-
- ** New Term mode option `term-suppress-hard-newline'.
-
- ** Todo mode has been rewritten and enhanced.
- The Todo mode user manual describes all commands and most user
- options. To support some of these features, a new file format is
- used, which is incompatible with the old format; however, you can
- convert old todo and done item files to the new format on initializing
- the first new todo file, or at any later time with the provided
- conversion command. The previous version of todo-mode.el has been
- renamed to otodo-mode.el and is now obsolete. New features include:
-
- *** Support for multiple todo files and archive files of done items.
-
- *** Renaming, reordering, moving, merging, and deleting categories.
-
- *** Sortable tabular summaries of categories and the item types they contain.
-
- *** Cross-category lists of items filtered by specific criteria.
-
- *** More fine-grained interaction with the Emacs diary, by being able to
- decide for each todo item whether it appears in the Fancy Diary display.
-
- *** Highly flexible new item insertion and item editing.
-
- *** Moving items between categories, storing done items in their category
- or in archive files, undoing or unarchiving done items.
-
- *** Reprioritizing items by inputting a numerical priority.
-
- *** Extensive customizability of operation and display, including many faces.
-
- ** Trace
-
- *** `trace-function' and `trace-function-background' no longer prompt for
- the output buffer. Unless you use a prefix argument, they output to
- `trace-buffer'.
-
- *** With a prefix argument, `trace-function' and `trace-function-background'
- will prompt for a "context". This is a Lisp expression, whose value at the
- time the function is entered/exited is printed along with the function's
- name and arguments.
-
- ** Tramp
-
- *** New connection method "adb", which allows to access Android
- devices by the Android Debug Bridge. The variable `tramp-adb-program'
- can be used to adapt the path of the "adb" program, if needed.
-
- *** Handlers for `file-acl' and `set-file-acl' for remote machines
- that support POSIX ACLs.
-
- *** Handlers for `file-notify-add-watch' and `file-notify-rm-watch'
- for remote machines that support filesystem notifications.
-
- *** The experimental url syntax for remote file names has been removed.
-
- *** The connection methods "plink1", "ssh1", "ssh2", "scp1", "scp2",
- "scpc" and "rsyncc" are discontinued. The ssh option
- "ControlMaster=auto" is set automatically in all ssh-based methods,
- when possible. See `tramp-use-ssh-controlmaster-options'.
-
- ** New URL command `url-cookie-list' displays the current cookies,
- and allows you to interactively remove cookies.
-
- ** VC and related modes
-
- *** In VC directory mode, `D' displays diffs between VC-controlled
- whole tree revisions.
-
- *** In VC directory mode, `L' lists the change log for the current VC
- controlled tree in a window.
-
- *** In VC directory mode, `I' shows a log of changes that will be
- received with a pull operation.
-
- *** `C-x v G' (globally) and `G' (in VC directory mode) ignores a file
- under current version control system. When called with a prefix
- argument, you can remove a file from the ignored file list.
-
- ** VHDL mode
-
- *** New options: `vhdl-actual-generic-name', `vhdl-beautify-options'.
-
- *** New commands: `vhdl-fix-statement-region', `vhdl-fix-statement-buffer'.
-
- ** The Woman commands `woman-default-faces' and `woman-monochrome-faces'
- are obsolete. Customize the `woman-*' faces instead.
-
- ** More packages look for ~/.emacs.d/<foo> additionally to ~/.<foo>.
- Affected files:
- ~/.emacs.d/timelog replaces ~/.timelog
- ~/.emacs.d/vip replaces ~/.vip
- ~/.emacs.d/viper replaces ~/.viper
- ~/.emacs.d/ido.last replaces ~/.ido.last
- ~/.emacs.d/kkcrc replaces ~/.kkcrc
- ~/.emacs.d/quickurls replaces ~/.quickurls
- ~/.emacs.d/idlwave/ replaces ~/.idlwave/
- ~/.emacs.d/bdfcache.el replaces ~/.bdfcache.el
- ~/.emacs.d/places replaces ~/.emacs-places
- ~/.emacs.d/shadows replaces ~/.shadows
- ~/.emacs.d/shadow_todo replaces ~/.shadow_todo
- ~/.emacs.d/strokes replaces ~/.strokes
- ~/.emacs.d/notes replaces ~/.notes
- ~/.emacs.d/type-break replaces ~/.type-break
- Also the following files used by the now obsolete otodo-mode.el:
- ~/.emacs.d/todo-do replaces ~/.todo-do
- ~/.emacs.d/todo-done replaces ~/.todo-done
- ~/.emacs.d/todo-top replaces ~/.todo-top
-
- ** Obsolete packages
-
- *** iswitchb.el; use icomplete-mode.
-
- *** longlines.el; use visual-line-mode.
-
- *** meese.el.
-
- *** sup-mouse.el.
-
- *** terminal.el; use term.el instead.
-
- *** the old version of todo-mode.el (renamed to otodo-mode.el).
-
- *** xesam.el (owing to the cancellation of the XESAM project).
-
- *** yow.el; use fortune.el or cookie1.el instead.
-
- \f
- * New Modes and Packages in Emacs 24.4
-
- ** New package eww.el provides a built-in web browser.
- This requires Emacs to have been compiled with libxml2 support.
-
- ** New package nadvice.el offers lighter-weight advice facilities.
- It is layered as:
-
- *** `add-function'/`remove-function', which can be used to add/remove code on
- any function-carrying place, such as process filters or `<foo>-function' hooks.
-
- *** `advice-add'/`advice-remove' to add/remove a piece of advice on a named
- function, much like `defadvice' does.
-
- ** New package frameset.el provides a set of operations to save a frameset
- (the state of all or a subset of the existing frames and windows, somewhat
- similar to a frame configuration), both in-session and persistently, and
- restore it at some point in the future.
-
- ** New package filenotify.el provides an interface for file system
- notifications. It requires that Emacs be compiled with one of the
- low-level libraries gfilenotify.c, inotify.c or w32notify.c.
-
- ** New minor modes `prettify-symbols-mode' and `global-prettify-symbols-mode'
- display specified symbols as composed characters. E.g., in Emacs Lisp mode,
- this replaces the string "lambda" with the Greek lambda character.
-
- ** New minor mode `superword-mode', which overrides the default word motion
- commands to treat "symbol_words" as a single word, similar to what
- `subword-mode' does.
-
- \f
- * Incompatible Lisp Changes in Emacs 24.4
-
- ** The default file coding for Emacs Lisp files is now utf-8.
- (See `file-coding-system-alist'.) In most cases, this change is
- transparent, but files that contain unusual characters without
- specifying an explicit coding system may fail to load with obscure
- errors. You should either convert them to utf-8 or add an explicit
- `coding:' cookie.
-
- ** Default process filters and sentinels are not nil any more.
- Instead they default to a function that does what the nil value used to do.
-
- ** Overlay priority does not have to be nil or a non-negative integer.
- Overlay priority can be other kinds of Lisp objects. We didn't yet
- decide whether other types of values are stable enough, and therefore
- don't feel it's right to document them. For now, don't assume in your
- code that the values of overlay priority can only be either nil or an
- integer, always test them with an appropriate predicate to be one or
- the other. If you need to sort arbitrary overlays into priority
- order, `overlays-at' can now optionally do this.
- You should still only specify integer priorities on overlays you create.
-
- ** The cars of the elements in `interpreter-mode-alist' are now
- treated as regexps rather than literal strings.
-
- ** `overriding-terminal-local-map' no longer replaces the local keymaps.
- It used to disable the minor mode, major mode, and text-property keymaps,
- whereas now it simply has higher precedence.
-
- ** `kill-region' has lost its `yank-handler' optional argument.
-
- ** `(input-pending-p)' no longer runs other timers that are ready to run.
- The new optional CHECK-TIMERS parameter allows for the prior behavior.
-
- ** `defvar' and `defcustom' in a let-binding affect the "external" default.
-
- ** The syntax of ?» and ?« is now punctuation instead of matched parens.
- Some languages match those as »...«, and others as «...», so it is
- better for Emacs to stay neutral by default.
-
- ** `read-event' does not always decode chars in ttys any more. As was the case
- in Emacs 22 and before, `read-event' (and `read-char') by default read raw
- bytes from the terminal. If you want to read decoded chars instead (as was
- always the case in Emacs-23, for example), pass a non-nil
- `inherit-input-method' argument.
-
- ** In `symbol-function', nil and "unbound" are indistinguishable.
- `symbol-function' does not signal a `void-function' error any more.
- To determine if a symbol's function definition is void, use `fboundp'.
-
- ** `defadvice' does not honor the `freeze' flag and cannot advise
- special-forms any more.
-
- ** `dolist' no longer binds VAR while evaluating the RESULT form,
- when lexical binding is enabled. Previously, VAR was bound to nil,
- which often led to spurious unused-variable warnings.
-
- ** The return value of `backup-buffer' has changed.
- The second argument is no longer an SELinux context, instead it is an
- alist of extended attributes as returned by the new function
- `file-extended-attributes'. The attributes can be applied to another
- file using `set-file-extended-attributes'.
-
- ** By default `copy-file' no longer copies file permission bits to an
- existing destination; and it sets the file permission bits of a newly
- created destination to those of the source, masked by the default file
- permissions. To copy the file permission bits, pass t as the
- PRESERVE-PERMISSIONS argument of `copy-file'.
-
- ** `visited-file-modtime' now returns -1 for nonexistent files.
- Formerly it returned a list (-1 LOW USEC PSEC), but this was ambiguous
- in the presence of files with negative time stamps.
-
- ** Frame-local variables that affect redisplay do not work any more.
- More specifically, redisplay does not bother to check for a frame-local
- value when looking up variables.
-
- ** In compiled Lisp files, the header no longer includes a timestamp.
-
- ** The option `inhibit-local-menu-bar-menus' has been removed.
-
- \f
- * Lisp Changes in Emacs 24.4
-
- ** Change to the Emacs Lisp coding conventions: the package descriptor
- and name of global variables, constants, and functions should be separated
- by two hyphens if the symbol is not meant to be used by other packages.
-
- ** The second argument of `eval' can now specify a lexical environment.
-
- ** New macro `define-alternatives' can be used to define generic commands.
- Generic commands are interactive functions whose implementation can be
- selected among several alternatives, as a matter of user preference.
-
- ** Numeric comparison functions =, <, >, <=, >= can now take many arguments.
-
- ** New functions `special-form-p' and `macrop'.
-
- ** New macro `with-eval-after-load'.
- This is like the old `eval-after-load', but better behaved.
-
- ** If you give a symbol a `defalias-fset-function' property, `defalias'
- on that symbol will use the associated value as a function to call
- in place of `fset'.
-
- ** New variable `enable-dir-local-variables'.
- Directory-local variables are ignored if this is nil. This may be
- useful for modes that want to ignore directory-locals while still
- respecting file-local variables.
-
- ** `read-regexp' now uses the new variable `read-regexp-defaults-function'
- as a function to call to provide default values.
-
- ** New functions `group-gid' and `group-real-gid'.
-
- ** New function `get-pos-property'.
-
- ** New hook `pre-redisplay-function'.
-
- ** `byte-compile-interactive-only-functions' is now obsolete.
- To specify that a command should only be called interactively, give it
- a non-nil `interactive-only' property.
-
- ** New function `string-suffix-p'.
-
- ** `split-string' now takes an optional argument TRIM.
- The value, if non-nil, is a regexp that specifies what to trim from
- the start and end of each substring.
-
- ** Completion
-
- *** The separator used by `completing-read-multiple' is now a regexp.
- The default `crm-separator' has been changed to allow surrounding spaces
- around the comma.
-
- *** New function `completion-table-with-cache' is a wrapper for
- `completion-table-dynamic' that caches the result of the last lookup.
-
- *** New function `completion-table-merge' to combine several
- completion tables by merging their completions.
-
- *** The `common-substring' argument of `display-completion-list',
- which has been documented as obsolete since Emacs 23.1, is now _really_
- obsolete, and no longer advertised. Instead either call
- `completion-hilit-commonality' to add the highlighting; or use
- `completion-all-completions', which returns highlighted strings.
-
- ** Encoding and decoding of text
-
- *** New coding-system `prefer-utf-8'.
- This is like `undecided' but prefers UTF-8 on decoding if the text to
- be decoded does not contain any invalid UTF-8 sequences. On encoding,
- any non-ASCII characters are automatically encoded as UTF-8.
-
- *** New attributes of coding-systems whose type is `undecided'.
- Two new attributes, `:inhibit-null-byte-detection' and
- `:inhibit-iso-escape-detection', determine how to detect encoding of
- text that includes null bytes and ISO-2022 escape sequences, respectively.
- Each of these attributes can be either nil, zero, or t. If t, decoding
- text ignores null bytes and ISO-2022 sequences, respectively. If nil,
- null bytes cause text to be decoded with no-conversion, and ISO-2022
- sequences cause Emacs to assume the text is encoded in one of the ISO-2022
- encodings, such as iso-2022-7bit. If zero, Emacs consults the variables
- `inhibit-null-byte-detection' and `inhibit-iso-escape-detection'.
- The new attribute `:prefer-utf-8', if non-nil, causes Emacs to prefer
- UTF-8 encoding and decoding, whenever possible.
-
- These attributes are only meaningful for coding-systems of type `undecided'.
- (The type of a coding-system is determined by its `:coding-type' attribute
- and can be accessed by calling the `coding-system-type' function.)
-
- ** Error-handling
-
- *** New function `define-error'.
-
- *** `with-demoted-errors' takes an additional argument `format'.
-
- ** Faces
-
- *** Face specs set via Custom themes now replace the `defface' spec
- rather than inheriting from it. In other words, setting a face via a
- theme now behaves like setting it via Customize: you only need to
- specify the attributes that you want, you don't need to unset those
- that you don't want.
-
- *** The function `face-spec-set' is now like `setq' for face specs.
- Its third arg now accepts values specifying a face spec type (defface,
- custom, or override spec), and the relevant spec is set accordingly.
-
- *** New face spec attribute :distant-foreground
- specifies foreground to use if background color is near the foreground
- color that would otherwise have been used.
-
- *** New function `add-face-text-property', which can be used to
- conveniently prepend/append new face properties.
-
- *** New face characteristic (supports :underline (:style wave))
- specifies whether or not the terminal can display a wavy line.
-
- ** File-handling
-
- *** Support for filesystem notifications.
- Emacs now supports notifications of filesystem changes, such as
- creation, modification, and deletion of files. This requires the
- `glib' API, or the 'inotify' API (on GNU/Linux systems only). On
- MS-Windows systems, this is supported for Windows XP and newer.
-
- *** The 9th element returned by `file-attributes' is now unspecified.
- Formerly, it was t if the file's gid would change if file were deleted
- and recreated. This value has been inaccurate for years on many
- platforms, and nobody seems to have noticed or cared.
-
- *** The 6th argument to `copy-file' has been renamed to
- PRESERVE-PERMISSIONS as it now handles ACL entries and the traditional
- Unix file permission bits as well as SELinux context.
-
- *** The function `file-ownership-preserved-p' now has an optional
- argument GROUP which causes it check for file group too. This can be
- used in place of the 9th element of `file-attributes'.
-
- *** The function `set-visited-file-modtime' now accepts a 0 or -1 argument,
- with the same interpretation as the returned value of `visited-file-modtime'.
-
- ** Image API
-
- *** `image-animated-p' is now `image-multi-frame-p'.
- It returns non-nil for any image that contains multiple frames,
- whether or not it specifies a frame delay.
-
- *** New variable `image-default-frame-delay' gives the frame delay for
- animated images which do not specify a frame delay.
-
- *** New functions `image-current-frame' and `image-show-frame' for getting
- and setting the current frame of a multi-frame image.
-
- ** ImageMagick
-
- *** ImageMagick images now support the :max-width and :max-height keywords.
-
- *** When using `create-image' with image data, you can pass a :format
- attribute (via the property-list argument) in order to help
- ImageMagick detect the image type. The value should be a MIME
- content-type that is found in the new variable `image-format-suffixes'.
-
- ** Revert and Autorevert
-
- *** If Emacs is compiled with file notification support, it uses notifications
- instead of checking file time stamps. To disable this, set the user option
- `auto-revert-use-notify' to nil. Alternatively, you can specify a regular
- expression matching directories to be excluded from file notifications via
- `auto-revert-notify-exclude-dir-regexp'.
-
- *** The default values of `buffer-stale-function', `revert-buffer-function',
- and `revert-buffer-insert-file-contents-function' are no longer nil.
- Instead they default to functions that do what the nil value used to.
-
- *** `buffer-stale-function' is now used for buffers visiting files too.
-
- *** The new user option `auto-revert-remote-files' enables reversion
- of remote files, if non-nil.
-
- ** Terminal
-
- *** Functions to pop up menus and dialogs now work on all terminals,
- including TTYs. This includes `x-popup-menu', `x-popup-dialog',
- `message-box', `yes-or-no-p', etc.
-
- The function `display-popup-menus-p' will now return non-nil for a
- display or frame whenever a mouse is supported on that display or frame.
-
- *** New hook `tty-setup-hook', run at the end of initializing a text terminal.
-
- *** The hook `term-setup-hook' is obsolete. It is entirely equivalent
- to `emacs-startup-hook'. See also the new `tty-setup-hook'.
-
- ** Minor internal changes to the details of lock files.
- The lock for DIR/FILE is now _always_ DIR/.#FILE.
- If DIR/.#FILE already exists and is not an Emacs lock file,
- Emacs makes no attempt to lock DIR/FILE. (Previously, it fell back to
- numbered lock files DIR/.#FILE.0...).
- On file systems that do not support symbolic links, the lock is now a
- regular file with contents being what would have been in the symlink.
-
- ** New bool-vector set operation functions:
- *** `bool-vector-exclusive-or'
- *** `bool-vector-union'
- *** `bool-vector-intersection'
- *** `bool-vector-set-difference'
- *** `bool-vector-not'
- *** `bool-vector-subsetp'
- *** `bool-vector-count-consecutive'
- *** `bool-vector-count-population'
-
- ** New library subr-x.el with miscellaneous small utility functions:
- *** `hash-table-keys'
- *** `hash-table-values'
- *** `string-blank-p'
- *** `string-empty-p'
- *** `string-join'
- *** `string-reverse'
- *** `string-trim-left'
- *** `string-trim-right'
- *** `string-trim'
- *** `string-remove-prefix'
- *** `string-remove-suffix'
-
- ** The `time-to-seconds' alias to `float-time' is no longer marked obsolete.
-
- ** The spelling of the rx.el category `chinese-two-byte' has been
- corrected (the first 'e' was missing).
-
- ** EIEIO namespace cleanup, obsolete-aliasing functions to use `eieio-' prefix:
- *** object-name -> eieio-object-name
- *** object-class -> eieio-object-class
- *** object-class-fast -> eieio--object-class
- *** object-class-name -> eieio-object-class-name
- *** object-name-string -> eieio-object-name-string
- *** object-num-slots -> eieio--object-num-slots
- *** object-set-name-string -> eieio-object-set-name-string
- *** class-of -> eieio-object-class
- *** class-name -> eieio-class-name
- *** class-parent -> eieio-class-parent
- *** class-parents -> eieio-class-parents
- *** class-parents-fast -> eieio-class-parents-fast
- *** class-children -> eieio-class-children
- *** class-num-slots -> eieio--class-num-slots
- *** class-precedence-list -> eieio-class-precedence-list
- *** class-direct-subclasses -> eieio-class-children
- *** class-direct-superclasses -> eieio-class-parents
-
- ** Obsoleted functions
- *** `log10'
- *** `dont-compile'
- *** `lisp-complete-symbol'
- *** `field-complete'
- *** `minibuffer-completion-contents'
- *** `isearch-nonincremental-exit-minibuffer'
- *** `isearch-filter-visible'
- *** `generic-make-keywords-list'
- *** `get-upcase-table' (use `case-table-get-table' instead).
-
- ** `with-wrapper-hook' is obsoleted by `add-function'.
- The few hooks that used with-wrapper-hook are replaced as follows:
- *** `abbrev-expand-function' obsoletes `abbrev-expand-functions'.
- *** `completion-in-region-function' obsoletes `completion-in-region-functions'.
- *** `filter-buffer-substring-function' obsoletes `filter-buffer-substring-functions'.
-
- \f
- * Changes in Emacs 24.4 on Non-Free Operating Systems
-
- ** New Core Text based font backend for Mac OS X 10.5 and newer.
- To use the old font backend, use the following on the command line:
- % defaults write org.gnu.Emacs FontBackend ns
- GNUstep and Mac OS X 10.4 use the old font backend.
-
- ** Improved fullscreen support on Mac OS X 10.7 and newer, where the
- default fullscreen method is now "native" fullscreen. To use the
- old style fullscreen, customize `ns-use-native-fullscreen' to nil.
-
- ** On Mac OS X 10.7 and newer, Emacs can use sRGB colorspace, and does so
- by default. Customize `ns-use-srgb-colorspace' to go back to the old method.
- Note that this does not apply to images.
-
- ** The procedure for building Emacs on MS-Windows has changed.
- It is now built by running the same configure script as on all other
- platforms. This requires the MSYS environment and MinGW development
- tools. See the updated instructions in nt/INSTALL for details.
-
- Using the Posix configure script and Makefiles also means a change in
- the directory structure of the Emacs installation on Windows. It is
- now the same as on GNU and Unix systems. In particular, the auxiliary
- programs, such as cmdproxy.exe and hexl.exe, are in
- libexec/emacs/VERSION/i686-pc-mingw32 (where VERSION is the Emacs
- version), version-independent site-lisp is in share/emacs/site-lisp,
- version-specific Lisp files are in share/emacs/VERSION/lisp and in
- share/emacs/VERSION/site-lisp, Info docs are in share/info, and data
- files are in share/emacs/VERSION/etc. (Emacs knows about all these
- directories and will find the files in there automatically; there's no
- need to set any variables due to this change.)
-
- ** Emacs on Windows 2000 and later can now access files and directories
- whose names cannot be encoded in the current system codepage.
-
- The new variable `w32-unicode-filenames' controls this feature: if it
- is t, Emacs uses Unicode APIs to pass file names to system calls,
- which lifts the limitation of file names to the current locale.
-
- ** Lock files now work on MS-Windows.
- This helps to prevent losing your edits if the same file is being
- edited in another Emacs session or by another user. See the node
- "Interlocking" in the Emacs User Manual for the details. To disable
- file locking, customize `create-lockfiles' to nil.
-
- ** The "generate a backtrace on fatal error" feature now works on MS-Windows.
- The backtrace is written to the 'emacs_backtrace.txt' file in the
- directory where Emacs was running.
-
- ** The `network-interface-list' and `network-interface-info' functions
- are now available on MS-Windows.
-
- ** The variable `buffer-file-type' is no longer supported.
- Setting it has no effect, and %t in the mode-line format is ignored.
- Likewise, `file-name-buffer-file-type-alist' is now obsolete, and
- modifying it has no effect.
-
- \f
- * Installation Changes in Emacs 24.3
-
- ** The default X toolkit is now Gtk+ version 3.
- If you don't pass `--with-x-toolkit' to configure, or if you use
- `--with-x-toolkit=gtk' or `--with-x-toolkit=yes', configure will try
- to build with Gtk+ version 3, and if that fails, try Gtk+ version 2.
- You can explicitly require a specific version by passing
- `--with-x-toolkit=gtk2' or `--with-x-toolkit=gtk3' to configure.
-
- ** New configure option `--enable-link-time-optimization', to utilize
- an appropriate feature provided by GCC since version 4.5.0.
-
- ** New configure option `--without-all' to disable most of the optional
- features (image support, etc.) that are normally enabled by default.
-
- ** New configure option `--enable-gcc-warnings' (for developing/debugging
- Emacs). If building with GCC, this enables compile-time checks that
- warn/give errors about possibly-questionable C code. On a recent GNU
- system there should be no warnings; on older and on non-GNU systems
- the results may be useful to developers.
-
- ** The configure option `--enable-use-lisp-union-type' has been
- renamed to `--enable-check-lisp-object-type', as the resulting
- Lisp_Object type no longer uses a union to implement the compile time
- check that this option enables.
-
- ** The configure option `--disable-maintainer-mode' has been removed,
- as it was confusingly-named and rarely useful.
-
- ** The configure options `--program-prefix', `--program-suffix', and
- `--program-transform-name' apply to more than just the installed
- binaries. Now they also affect the man pages, icons, and the
- etc/emacs.desktop file; but not the info pages, since this would break
- links between the various manuals.
-
- ** You can use `NO_BIN_LINK=t make install' to prevent the installation
- overwriting "emacs" in the installation bin/ directory with a link
- to "emacs-VERSION".
-
- ** Emacs uses libtinfo in preference to libncurses, if available.
-
- ** On FreeBSD and NetBSD, configure no longer adds /usr/local/lib and
- /usr/pkg/lib to the linker search path. You must add them yourself if
- you want them.
-
- ** The standalone scripts `rcs-checkin' and `vcdiff' have been removed
- (from the bin and libexec directories, respectively). The former is
- no longer relevant, the latter is replaced by lisp (in vc-sccs.el).
-
- \f
- * Startup Changes in Emacs 24.3
-
- ** Emacs no longer searches for `leim-list.el' files beneath the standard
- lisp/ directory. There should not be any there anyway. If you have
- been adding them there, put them somewhere else; e.g., site-lisp.
-
- ** The `--no-site-lisp' command line option now works for Nextstep builds.
-
- \f
- * Changes in Emacs 24.3
-
- ** Help
-
- *** `C-h f' (`describe-function') can now perform autoloading.
- When this command is called for an autoloaded function whose docstring
- contains a key substitution construct, that function's library is
- automatically loaded, so that the documentation can be shown
- correctly. To disable this, set `help-enable-auto-load' to nil.
-
- *** `C-h f' now reports previously-autoloaded functions as "autoloaded",
- even after their associated libraries have been loaded (and the
- autoloads have been redefined as functions).
-
- ** ImageMagick
-
- *** Images displayed via ImageMagick now support transparency and the
- :background image specification property.
-
- *** When available, ImageMagick support is automatically enabled.
- It is no longer necessary to call `imagemagick-register-types'
- explicitly to install ImageMagick image types; that function is called
- automatically at startup, or when customizing an imagemagick- option.
-
- *** Setting `imagemagick-types-inhibit' to t now disables the use of
- ImageMagick to view images. (You must call `imagemagick-register-types'
- afterwards if you do not use customize to change this.)
-
- *** The new variable `imagemagick-enabled-types' also affects which
- ImageMagick types are treated as images. The function
- `imagemagick-filter-types' returns the list of types that will be
- treated as images.
-
- ** Minibuffer
-
- *** In minibuffer filename prompts, `C-M-f' and `C-M-b' now move to the
- next and previous path separator, respectively.
-
- *** `minibuffer-electric-default-mode' can shorten "(default ...)" to "[...]"
- in minibuffer prompts. Just set `minibuffer-eldef-shorten-default'
- non-nil before enabling the mode.
-
- ** Mode line
-
- *** New option `mode-line-default-help-echo' specifies the help text
- (shown in a tooltip or in the echo area) for any part of the mode line
- that does not have its own specialized help text.
-
- *** You can now click mouse-3 in the coding system indicator to invoke
- `set-buffer-file-coding-system'.
-
- ** Server and client
-
- *** emacsclient now obeys string values for `initial-buffer-choice',
- if it is told to open a new frame without specifying any file to visit
- or expression to evaluate.
-
- *** New option `server-auth-key' specifies a shared server key.
-
- ** Emacs now generates backtraces on fatal errors.
- On encountering a fatal error, Emacs now outputs a textual description
- of the fatal signal, and a short backtrace on platforms like glibc
- that support backtraces.
-
- ** `C-x C-q' is now bound to the new minor mode `read-only-mode'.
- This minor mode replaces `toggle-read-only', which is now obsolete.
-
- ** Most `y-or-n' prompts now allow you to scroll the selected window.
- Typing `C-v' or `M-v' at a y-or-n prompt scrolls forward or backward
- respectively, without exiting from the prompt.
-
- ** In the Package Menu, newly-available packages are listed as "new",
- and sorted above the other "available" packages by default.
-
- ** If your Emacs was built from a repository checkout, the new variable
- `emacs-bzr-version' contains information about the bzr revision used.
-
- ** New option `create-lockfiles' specifies usage of lockfiles.
- It defaults to t. Changing it to nil inhibits the creation of lock
- files (use this with caution).
-
- ** New option `enable-remote-dir-locals', if non-nil, allows directory-local
- variables on remote hosts.
-
- ** The entry for PCL-CVS has been removed from the Tools menu.
- The PCL-CVS commands are still available via the keyboard.
-
- ** Using "unibyte: t" in Lisp source files is obsolete.
- Use "coding: raw-text" instead.
-
- ** In the buffer made by `M-x report-emacs-bug', the `C-c m' binding
- has been changed to `C-c M-i' (`report-emacs-bug-insert-to-mailer').
- The previous binding, introduced in Emacs 24.1, was a mistake, because
- `C-c LETTER' bindings are reserved for user customizations.
-
- ** Internationalization
-
- *** New language environment: Persian.
-
- *** New input method `vietnamese-vni'.
-
- ** Nextstep (GNUstep / Mac OS X) port
-
- *** Support for fullscreen and the frame parameter fullscreen.
-
- *** A file dialog is used for open/save operations initiated from the
- menu/toolbar.
-
- \f
- * Editing Changes in Emacs 24.3
-
- ** Search and Replace
-
- *** Non-regexp Isearch now performs "lax" space matching.
- Each sequence of spaces in the supplied search string may match any
- sequence of one or more whitespace characters, as specified by the
- variable `search-whitespace-regexp'. (This variable is also used by a
- similar existing feature for regexp Isearch.)
-
- *** New Isearch command `M-s SPC' toggles lax space matching.
- This applies to both ordinary and regexp Isearch.
-
- *** New option `replace-lax-whitespace'.
- If non-nil, `query-replace' uses flexible whitespace matching too.
- The default is nil.
-
- *** Global `M-s _' starts a symbol (identifier) incremental search,
- and `M-s _' in Isearch toggles symbol search mode.
- `M-s c' in Isearch toggles search case-sensitivity.
-
- ** Navigation commands
-
- *** New binding `M-g c' for `goto-char'.
-
- *** New binding `M-g TAB' for `move-to-column'.
-
- *** `M-g TAB' (`move-to-column') prompts for a column number if called
- interactively with no prefix arg. Previously, it moved to column 1.
-
- ** New option `yank-handled-properties' allows processing of text
- properties on yanked text, in ways that are more general than just
- removing them (as is done by `yank-excluded-properties').
-
- ** New option `delete-trailing-lines' specifies whether
- M-x delete-trailing-whitespace should delete trailing lines at the end
- of the buffer. It defaults to t.
-
- ** `C-u M-=' now counts lines/words/characters in the entire buffer.
-
- ** `C-x 8 RET' is now bound to `insert-char', which is now a command.
- `ucs-insert' is now an obsolete alias for `insert-char'.
-
- ** The `z' key no longer has a binding in most special modes.
- It used to be bound to `kill-this-buffer', but `z' is too easy to
- accidentally type.
-
- ** New command `C-x r M-w' (`copy-rectangle-as-kill').
- It copies the region-rectangle as the last rectangle kill.
-
- ** Registers
-
- *** `C-x r +' is now overloaded to invoke `append-to-register'.
-
- *** New option `register-separator' specifies the register containing
- the text to put between collected texts for use with
- M-x append-to-register and M-x prepend-to-register.
-
- \f
- * Changes in Specialized Modes and Packages in Emacs 24.3
-
- ** Common Lisp emulation (CL)
-
- *** CL's main entry is now (require 'cl-lib).
- `cl-lib' is like the old `cl' except that it uses the namespace cleanly;
- i.e., all its definitions have the "cl-" prefix (and internal definitions
- use the "cl--" prefix).
-
- If `cl' provided a feature under the name `foo', then `cl-lib'
- provides it under the name `cl-foo' instead; with the exceptions of the
- few `cl' definitions that had to use `foo*' to avoid conflicts with
- pre-existing Elisp entities. These have been renamed to `cl-foo'
- rather than `cl-foo*'.
-
- The old `cl' is now deprecated and is mainly just a bunch of aliases that
- provide the old, non-prefixed names. Some exceptions are listed below:
-
- *** `cl-flet' is not like `flet' (which is deprecated).
- Instead it obeys the behavior of Common-Lisp's `flet'.
- In particular, in cl-flet function definitions are lexically scoped,
- whereas in flet the scoping is dynamic.
-
- *** `cl-labels' is slightly different from `labels'.
- The difference is that it relies on the `lexical-binding' machinery
- (as opposed to the `lexical-let' machinery used previously) to capture
- definitions in closures, so such closures will only work if `lexical-binding'
- is in use.
-
- *** `cl-letf' is not exactly like `letf'.
- The only difference is in details that relate to some deprecated usage
- of `symbol-function' in place forms.
-
- *** `progv' was rewritten to use the `let' machinery.
- A side effect is that variables without corresponding values are bound
- to nil rather than being made unbound.
-
- *** The following methods of extending `setf' are obsolete
- (use features from gv.el instead):
- `define-modify-macro' (use `gv-letplace')
- `defsetf' (use `gv-define-simple-setter' or `gv-define-setter')
- `define-setf-expander' (use `gv-define-setter' or `gv-define-expander')
- `get-setf-method' no longer exists (see "Incompatible Lisp Changes")
-
- ** Diff mode
-
- *** Changes are now highlighted using the same color scheme as in
- modern VCSes. Deletions are displayed in red (new faces
- `diff-refine-removed' and `smerge-refined-removed', and new definition
- of `diff-removed'), insertions in green (new faces `diff-refine-added'
- and `smerge-refined-added', and new definition of `diff-added').
-
- *** The variable `diff-use-changed-face' defines whether to use the
- face `diff-changed', or `diff-removed' and `diff-added' to highlight
- changes in context diffs.
-
- *** The new command `diff-delete-trailing-whitespace' removes trailing
- whitespace introduced by a diff.
-
- ** Ediff now uses the same color scheme as Diff mode.
-
- ** Python mode
-
- A new version of python.el, which provides several new features, including:
- per-buffer shells, better indentation, Python 3 support, and improved
- shell-interaction compatible with iPython (and virtually any other
- text based shell).
-
- *** Some user options have been replaced/renamed, including (old -> new):
- **** python-indent -> python-indent-offset
- **** python-guess-indent -> python-indent-guess-indent-offset
- **** python-pdbtrack-do-tracking-p -> python-pdbtrack-activate
- **** python-use-skeletons -> python-skeleton-autoinsert
-
- *** Some user options have been removed, including:
-
- **** `python-indent-string-contents': Strings are never indented.
-
- **** `python-honour-comment-indentation':
- Comments are always considered as indentation markers.
-
- **** `python-continuation-offset': Indentation is automatically
- calculated in a pep8 compliant way depending on the context.
-
- **** `python-shell-prompt-alist', `python-shell-continuation-prompt-alist':
- Have no direct mapping as the shell interaction is completely different.
-
- **** `python-python-command', `python-jython-command':
- Replaced by `python-shell-interpreter'.
-
- **** `inferior-python-filter-regexp', `python-remove-cwd-from-path',
- `python-pdbtrack-minor-mode-string', `python-source-modes':
- No longer relevant.
-
- *** Some commands have been replaced (old -> new):
- **** python-insert-class -> python-skeleton-class
- **** python-insert-def -> python-skeleton-def
- **** python-insert-for -> python-skeleton-for
- **** python-insert-if -> python-skeleton-if
- **** python-insert-try/except -> python-skeleton-try
- **** python-insert-try/finally -> python-skeleton-try
- **** python-insert-while -> python-skeleton-while
- **** python-find-function -> python-nav-jump-to-defun
- **** python-next-statement -> python-nav-forward-sentence
- **** python-previous-statement -> python-nav-backward-sentence
- **** python-beginning-of-defun-function -> python-nav-beginning-of-defun
- **** python-end-of-defun-function -> python-nav-end-of-defun
- **** python-send-buffer -> python-shell-send-buffer
- **** python-send-defun -> python-shell-send-defun
- **** python-send-region -> python-shell-send-region
- **** python-send-region-and-go -> emulate with python-shell-send-region
- and python-shell-switch-to-shell
- **** python-send-string -> python-shell-send-string
- **** python-switch-to-python -> python-shell-switch-to-shell
- **** python-describe-symbol -> python-eldoc-at-point
-
- ** D-Bus
-
- *** New variables `dbus-compiled-version' and `dbus-runtime-version'.
-
- *** The D-Bus object manager interface is implemented.
-
- *** Variables of type :(u)int32 and :(u)int64 accept floating points,
- if their value does not fit into Emacs's integer range.
-
- *** The function `dbus-call-method' is now non-blocking.
- It can be interrupted by `C-g'. `dbus-call-method-non-blocking' is obsolete.
-
- *** Signals can also be sent as unicast messages.
-
- *** The argument list of `dbus-register-signal' has been extended,
- according to the new match rule types of D-Bus.
-
- *** `dbus-init-bus' supports private connections.
-
- *** There is a new function `dbus-setenv'.
-
- ** `desktop-path' no longer includes the "." directory.
- Desktop files are now located in ~/.emacs.d by default.
-
- ** Dired
-
- *** `dired-do-async-shell-command' executes each file sequentially
- if the command ends in `;' (when operating on multiple files).
- Otherwise, it executes the command on each file in parallel.
-
- *** Typing `M-n' in the minibuffer of `dired-do-chmod', `dired-do-chgrp',
- `dired-do-chown', and `dired-do-touch' yanks the attributes of the
- file at point.
-
- *** When the region is active, `m' (`dired-mark'), `u' (`dired-unmark'),
- `DEL' (`dired-unmark-backward'), and `d' (`dired-flag-file-deletion')
- mark/unmark/flag all files in the active region.
-
- *** The minibuffer default for `=' (`dired-diff') has changed.
- It is now the backup file for the file at point, if one exists.
- In Transient Mark mode the default is the file at the active mark.
-
- *** `M-=' is no longer bound to `dired-backup-diff' in Dired buffers.
- The global binding for `M-=', `count-words-region' is in effect.
-
- ** ERC
-
- *** New module "notifications", which can send a notification when you
- receive a private message or your nickname is mentioned.
-
- *** ERC will look up server/channel names via auth-source and use any
- channel keys found.
-
- *** New option `erc-lurker-hide-list', similar to `erc-hide-list', but
- only applies to messages sent by lurkers.
-
- ** reStructuredText mode
-
- *** Keybindings (see `C-c C-h'), TAB indentation, filling and auto-filling,
- fontification, comment handling, and customization have all been revised
- and improved.
-
- *** Support for `imenu' and `which-function-mode'.
-
- *** The reStructuredText syntax is more closely covered.
- Sphinx support has been improved.
-
- *** `rst-insert-list' inserts new list or continues existing lists.
-
- *** A negative prefix argument always works for `rst-adjust'.
-
- *** The window configuration is reset after displaying a TOC.
-
- *** The constant `rst-version' describes the rst.el package version.
-
- ** Ruby mode
-
- *** Support for percent literals and recognition of regular expressions
- in method calls without parentheses with more methods, including Cucumber
- steps definitions.
-
- *** Improved syntax highlighting and indentation.
-
- *** New command `ruby-toggle-block', bound to `C-c {'.
-
- *** Some non-standard keybindings/commands have been removed:
-
- **** `ruby-electric-brace'; use `electric-indent-mode' instead.
-
- **** `ruby-mark-defun'; use `mark-defun'.
-
- **** `ruby-beginning-of-defun' and `ruby-end-of-defun' are replaced by
- appropriate settings for the variables `beginning-of-defun-function'
- and `end-of-defun-function'.
-
- **** Non-standard keybindings for `backward-kill-word', `comment-region',
- `reindent-then-newline-and-indent' and `newline' have been removed.
-
- ** Shell Script mode
-
- *** Pairing of parens/quotes uses `electric-pair-mode' instead of skeleton-pair.
-
- *** `sh-electric-here-document-mode' now controls auto-insertion of here-docs.
-
- *** `sh-use-smie' lets you choose a new indentation and navigation code.
-
- ** VHDL mode
-
- *** The free software compiler GHDL is supported (and now the default).
-
- *** Support for the VHDL-AMS packages has been added/updated.
-
- *** Updated to the 2002 revision of the VHDL standard.
-
- *** Accepts \r and \f as whitespace.
-
- ** Apropos
-
- *** The faces used by Apropos are now directly customizable.
- These faces are named `apropos-symbol', `apropos-keybinding', and so on;
- see the `apropos' Custom group for details.
-
- *** The old options whose values specified faces to use have been removed
- (i.e. `apropos-symbol-face', `apropos-keybinding-face', `apropos-label-face',
- `apropos-match-face' and `apropos-property-face'.).
-
- ** Buffer Menu
-
- *** This package has been rewritten to use Tabulated List mode.
-
- *** Option `Buffer-menu-buffer+size-width' is now obsolete.
- Use `Buffer-menu-name-width' and `Buffer-menu-size-width' instead.
-
- ** Calc
-
- *** Algebraic simplification mode is now the default.
- To restrict to the limited simplifications given by the former
- default simplification mode, use `m I'.
-
- ** Calendar
-
- *** You can customize the header text that appears above each calendar month.
- See the variable `calendar-month-header'.
-
- *** New LaTeX calendar style, produced by `cal-tex-cursor-week2-summary'.
-
- *** The calendars produced by cal-html include holidays.
- Customize `cal-html-holidays' to change this.
-
- ** CEDET
-
- *** The major modes from the parser generators "Bovine" and "Wisent"
- are now properly integrated in Emacs. The file suffixes ".by" and ".wy"
- are in `auto-mode-alist', and the corresponding manuals are included.
-
- *** EDE
-
- **** Menu support for the "Configuration" feature. This allows users to
- choose the active configuration (such as debug or install) from the menu.
-
- **** New command `ede-set' to interactively set project-local variables.
-
- **** Support for compiling, debugging, and running in "generic" projects.
-
- **** Autoconf editing support for M4 macros with complex arguments.
-
- **** Compilation support for the "linux" project type.
-
- **** "simple" projects have been removed; use "generic" projects instead.
-
- *** Semantic
-
- **** Support for parsing #include statements inside a namespace in C/C++.
-
- **** Improved support for 'extern "C"' declarations in C/C++.
-
- **** The ability to ignore more common special C/C++ preprocessor symbols,
- such as '__nonnull' and '__asm'. Add '__cplusplus' macro when parsing C++.
- If available, include cdefs.h as an additional source of preprocessor symbols.
-
- **** Improved C/C++ function pointer parsing.
-
- **** In Python, support for converting imports to include file names.
-
- **** Ability to dynamically determine the Python load path.
-
- **** Support for the Python 'WITH' and 'AT' keywords.
-
- **** Improved tooltip completion.
-
- *** SRecode
-
- **** The SRecode manual is now included.
-
- **** Tag generation supports constructor/destructor settings and system
- include differentiation.
-
- **** Addition of 'Framework' support: Frameworks are specified when a
- particular kind of library (such as Android) is needed in a common language
- mode (like Java).
-
- **** Support for nested templates and let variables override based on priority.
-
- **** Support for merging tables from multiple related modes, such as
- default -> c++ -> arduino.
-
- ** Compile has a new option `compilation-always-kill'.
-
- ** Customize
-
- *** `custom-reset-button-menu' now defaults to t.
-
- *** Non-option variables are never matched in `customize-apropos' and
- `customize-apropos-options' (i.e., the prefix argument does nothing for
- these commands now).
-
- ** Term
-
- *** The variables `term-default-fg-color' and `term-default-bg-color'
- are now deprecated in favor of the customizable face `term'.
-
- *** You can customize how to display ANSI terminal colors and styles
- by customizing the corresponding `term-color-<COLOR>',
- `term-color-underline' and `term-color-bold' faces.
-
- ** Tramp
-
- *** The syntax has been extended in order to allow ad-hoc proxy definitions.
-
- *** Remote processes are now also supported on remote MS-Windows hosts.
-
- ** URL
-
- *** Structs made by `url-generic-parse-url' have nil `attributes' slot.
- Previously, this slot stored semicolon-separated attribute-value pairs
- appended to some imap URLs, but this is not compatible with RFC 3986.
- So now the `filename' slot stores the entire path and query components,
- and the `attributes' slot is always nil.
-
- *** New function `url-encode-url' for encoding a URI string.
- The `url-retrieve' function now uses this to encode its URL argument,
- in case that is not properly encoded.
-
- ** notifications.el supports now version 1.2 of the Notifications API.
- The function `notifications-get-capabilities' returns the supported
- server properties.
-
- ** Flymake uses fringe bitmaps to indicate errors and warnings.
- See `flymake-fringe-indicator-position', `flymake-error-bitmap' and
- `flymake-warning-bitmap'.
-
- ** The FFAP option `ffap-url-unwrap-remote' can now be a list of strings,
- specifying URL types that should be converted to remote file names at
- the FFAP prompt. The default is now '("ftp").
-
- ** New Ibuffer `derived-mode' filter, bound to `/ M'.
- The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.
-
- ** New option `mouse-avoidance-banish-position' specifies where the
- `banish' mouse avoidance setting moves the mouse.
-
- ** In Perl mode, new option `perl-indent-parens-as-block' causes non-block
- closing brackets to be aligned with the line of the opening bracket.
-
- ** In Proced mode, new command `proced-renice' renices marked processes.
-
- ** New option `async-shell-command-buffer' specifies the buffer to use
- for a new asynchronous `shell-command' when the default output buffer
- `*Async Shell Command*' is already in use.
-
- ** SQL mode has a new option `sql-db2-escape-newlines'.
- If non-nil, newlines sent to the command interpreter will be escaped
- by a backslash. The default does not escape the newlines and assumes
- that the sql statement will be terminated by a semicolon.
-
- ** New command `tabulated-list-sort', bound to `S' in Tabulated List mode
- (and modes that derive from it), sorts the column at point, or the Nth
- column if a numeric prefix argument is given.
-
- ** `which-func-modes' now defaults to t, so Which Function mode, when
- enabled, applies to all applicable major modes.
-
- ** `winner-mode-hook' now runs when the mode is disabled, as well as when
- it is enabled.
-
- ** Follow mode no longer works by using advice.
- The option `follow-intercept-processes' has been removed.
-
- ** `javascript-generic-mode' is now an obsolete alias for `js-mode'.
-
- ** Hooks renamed to avoid obsolete "-hooks" suffix:
- *** semantic-lex-reset-hooks -> semantic-lex-reset-functions
- *** semantic-change-hooks -> semantic-change-functions
- *** semantic-edits-new-change-hooks -> semantic-edits-new-change-functions
- *** semantic-edits-delete-change-hooks -> semantic-edits-delete-change-functions
- *** semantic-edits-reparse-change-hooks -> semantic-edits-reparse-change-functions
- *** semanticdb-save-database-hooks -> semanticdb-save-database-functions
- *** c-prepare-bug-report-hooks -> c-prepare-bug-report-hook
- *** rcirc-sentinel-hooks -> rcirc-sentinel-functions
- *** rcirc-receive-message-hooks -> rcirc-receive-message-functions
- *** rcirc-activity-hooks -> rcirc-activity-functions
- *** rcirc-print-hooks -> rcirc-print-functions
- *** dbus-event-error-hooks -> dbus-event-error-functions
- *** eieio-pre-method-execution-hooks -> eieio-pre-method-execution-functions
- *** checkdoc-style-hooks -> checkdoc-style-functions
- *** checkdoc-comment-style-hooks -> checkdoc-comment-style-functions
- *** archive-extract-hooks -> archive-extract-hook
- *** filesets-cache-fill-content-hooks -> filesets-cache-fill-content-hook
- *** hfy-post-html-hooks -> hfy-post-html-hook
- *** nndiary-request-create-group-hooks -> nndiary-request-create-group-functions
- *** nndiary-request-update-info-hooks -> nndiary-request-update-info-functions
- *** nndiary-request-accept-article-hooks -> nndiary-request-accept-article-functions
- *** gnus-subscribe-newsgroup-hooks -> gnus-subscribe-newsgroup-functions
-
- ** Obsolete packages
-
- *** assoc.el
- In most cases, assoc+member+push+delq work just as well.
- And in any case it's just a terrible package: ugly semantics, terrible
- inefficiency, and not namespace-clean.
- *** bruce.el
- *** cust-print.el
- *** ledit.el
- *** mailpost.el
- *** mouse-sel.el
- *** patcomp.el
-
- \f
- * Incompatible Lisp Changes in Emacs 24.3
-
- ** Docstrings starting with `*' no longer indicate user options.
- Only variables defined using `defcustom' are considered user options.
- The function `user-variable-p' is now an obsolete alias for
- `custom-variable-p'.
-
- ** The return values of `defalias', `defun' and `defmacro' have changed,
- and are now undefined. For backwards compatibility, `defun' and
- `defmacro' currently return the name of the newly defined
- function/macro, but this should not be relied upon.
-
- ** `random' by default now returns a different random sequence in
- every Emacs run. Use `(random S)', where S is a string, to set the
- random seed to a value based on S, in order to get a repeatable
- sequence in later calls.
-
- ** If the NEWTEXT arg to `replace-match' contains a substring "\?",
- that substring is inserted literally even if the LITERAL arg is
- non-nil, instead of causing an error to be signaled.
-
- ** `select-window' now always makes the window's buffer current.
- It does so even if the window was selected before.
-
- ** The function `x-select-font' can return a font spec, instead of a
- font name as a string. Whether it returns a font spec or a font name
- depends on the graphical library.
-
- ** `face-spec-set' no longer sets frame-specific attributes when the
- third argument is a frame (that usage was obsolete since Emacs 22.2).
-
- ** `set-buffer-multibyte' now signals an error in narrowed buffers.
-
- ** The CL package's `get-setf-method' function no longer exists.
- Generalized variables are now part of core Emacs Lisp, and implemented
- differently to the way cl.el used to do it. It is not possible to
- define a compatible replacement for `get-setf-method'. See the file
- gv.el for internal details of the new implementation.
-
- ** The arguments of `dbus-register-signal' are no longer just strings,
- but keywords or keyword-string pairs. The old argument list will
- still be supported for Emacs 24.x.
-
- ** Miscellaneous name changes
- Some Lisp symbols have been renamed to correct their spelling,
- or to be more consistent with standard Emacs terminology.
-
- *** Renamed functions
- **** hangul-input-method-inactivate -> hangul-input-method-deactivate
- **** inactivate-input-method -> deactivate-input-method
- **** quail-inactivate -> quail-deactivate
- **** robin-inactivate -> robin-deactivate
- **** viper-inactivate-input-method -> viper-deactivate-input-method
- **** viper-inactivate-input-method-action ->
- viper-deactivate-input-method-action
- **** ucs-input-inactivate -> ucs-input-deactivate
-
- *** Renamed hooks
- The old hooks are still supported for backward compatibility, but they
- are deprecated and will be removed eventually.
- **** input-method-inactivate-hook -> input-method-deactivate-hook
- **** robin-inactivate-hook -> robin-deactivate-hook
- **** quail-inactivate-hook -> quail-deactivate-hook
-
- *** Renamed variables
- **** follow-deactive-menu -> follow-inactive-menu
- **** inactivate-current-input-method-function ->
- deactivate-current-input-method-function
-
- ** Some obsolete functions, variables, and faces have been removed:
- *** `last-input-char', `last-command-char', `unread-command-char'
- *** `facemenu-unlisted-faces'
- *** `rmail-decode-mime-charset'
- *** `iswitchb-read-buffer'
- *** `sc-version', `sc-submit-bug-report'
- *** `set-char-table-default'
- *** `string-to-sequence' (use `string-to-list' or `string-to-vector')
- *** `compile-internal'
- *** `modeline'
- *** `mode-line-inverse-video'
- *** `follow-mode-off-hook'
- *** `cvs-commit-buffer-require-final-newline'
- (use `log-edit-require-final-newline' instead)
- *** `cvs-changelog-full-paragraphs'
- (use `log-edit-changelog-full-paragraphs' instead)
- *** `cvs-diff-ignore-marks', `cvs-diff-buffer-name'
- *** `vc-ignore-vc-files' (use `vc-handled-backends' instead)
- *** `vc-master-templates' (use `vc-handled-backends' instead)
- *** `vc-checkout-carefully'
-
- \f
- * Lisp Changes in Emacs 24.3
-
- ** CL-style generalized variables are now in core Elisp.
- `setf' is autoloaded; `push' and `pop' accept generalized variables.
- You can define your own generalized variables using `gv-define-simple-setter',
- `gv-define-setter', etc.
-
- ** Emacs tries to macroexpand interpreted (non-compiled) files during load.
- This can significantly speed up execution of non-byte-compiled code,
- but can also bump into previously unnoticed cyclic dependencies.
- These are generally harmless: they will simply cause the macro calls
- to be left for later expansion (as before), but will result in a
- warning ("Eager macro-expansion skipped due to cycle") describing the cycle.
- You may wish to restructure your code so this does not happen.
-
- ** New sampling-based Elisp profiler.
- Try M-x profiler-start, do some work, and then call M-x profiler-report.
- When finished, use M-x profiler-stop. The sampling rate can be based on
- CPU time or memory allocations.
-
- ** `defun' also accepts a (declare DECLS) form, like `defmacro'.
- The interpretation of the DECLS is determined by `defun-declarations-alist'.
-
- ** New macros `setq-local' and `defvar-local'.
-
- ** Face underlining can now use a wave.
-
- ** `read-regexp' has a new argument HISTORY; the first argument PROMPT
- of `read-regexp' accepts a string ending with a colon and space, and its
- second argument DEFAULTS can be a list of strings accessible via `M-n'
- in the minibuffer ahead of other hard-coded useful regexp-related values.
- More commands use `read-regexp' now to read their regexp arguments.
-
- ** Completion
-
- *** New function `completion-table-with-quoting' to handle completion
- in the presence of quoting, such as file completion in shell buffers.
-
- *** New function `completion-table-subvert' to use an existing completion
- table, but with a different prefix.
-
- ** Debugger
-
- *** New error type and new function `user-error'.
- These do not trigger the debugger.
-
- *** New option `debugger-bury-or-kill', saying what to do with the
- debugger buffer when exiting debug.
-
- *** Set `debug-on-message' to enter the debugger when a certain
- message is displayed in the echo area. This can be useful when trying
- to work out which code is doing something.
-
- *** New var `inhibit-debugger', automatically set to prevent accidental
- recursive invocations.
-
- ** Window handling
-
- *** New command `fit-frame-to-buffer' adjusts the frame height to
- fit the contents.
-
- *** The command `fit-window-to-buffer' can adjust the frame height
- if the new option `fit-frame-to-buffer' is non-nil.
-
- *** New macro `with-temp-buffer-window', similar to
- `with-output-to-temp-buffer'.
-
- *** `temp-buffer-resize-mode' no longer resizes windows that have been
- reused.
-
- *** New option `switch-to-buffer-preserve-window-point' to restore a
- window's point when switching buffers.
-
- *** New display action alist entries `window-height' and `window-width'
- specify the size of new windows created by `display-buffer'.
-
- *** New display action alist entry `pop-up-frame-parameters', if
- non-nil, specifies frame parameters to give any newly-created frame.
-
- *** New display action alist entry `inhibit-switch-frame', if non-nil,
- tells display action functions to avoid changing which frame is
- selected.
-
- *** New display action alist entry `previous-window', if non-nil,
- specifies window to reuse in `display-buffer-in-previous-window'.
-
- *** New display action functions `display-buffer-below-selected',
- and `display-buffer-in-previous-window'.
-
- *** The functions `get-lru-window', `get-mru-window' and `get-largest-window'
- now accept a third argument to avoid choosing the selected window.
-
- *** Additional values recognized for option `window-combination-limit'.
-
- *** The following variables are obsolete, as they can be replaced by
- appropriate entries in the `display-buffer-alist' function introduced
- in Emacs 24.1:
- **** `dired-shrink-to-fit'
- **** `display-buffer-reuse-frames'
- **** `display-buffer-function'
- **** `special-display-buffer-names'
- **** `special-display-frame-alist'
- **** `special-display-function'
- **** `special-display-regexps'
-
- ** Time
-
- *** `current-time-string' no longer requires that its argument's year
- must be in the range 1000..9999. It now works with any year supported
- by the underlying C implementation.
-
- *** `current-time' now returns extended-format time stamps
- (HIGH LOW USEC PSEC), where the new PSEC slot specifies picoseconds.
- PSEC is typically a multiple of 1000 on current machines. Other
- functions that use this format, such as `file-attributes' and
- `format-time-string', have been changed accordingly. Old-format time
- stamps are still accepted.
-
- *** The format of timers in `timer-list' and `timer-idle-list' is now
- [TRIGGERED-P HI-SECS LO-SECS USECS REPEAT-DELAY FUNCTION ARGS IDLE-DELAY PSECS].
- The PSECS slot is new, and uses picosecond resolution. It can be
- accessed via the new `timer--psecs' accessor.
-
- *** Last-modified time stamps in undo lists now are of the form
- (t HI-SECS LO-SECS USECS PSECS) instead of (t HI-SECS . LO-SECS).
-
- ** EIEIO
-
- *** Improved security when handling persistent objects:
-
- **** `eieio-persistent-read' now features optional arguments for specifying
- the class to load, as well as a flag stating whether subclasses are allowed;
- if provided, other classes will be rejected by the reader. For
- compatibility with existing code, if the class is omitted only a
- warning is issued.
-
- **** New specialized reader for pulling in classes and signaling errors
- without evaluation of suspicious code.
-
- **** All slots that contain objects must have a :type. Slots with lists
- of objects must use a new type predicate for a list of an object type.
-
- *** Support for `find-function' and similar utilities, through the addition
- of filename support to generated symbols.
-
- ** Floating point functions now always return special values like NaN,
- instead of signaling errors, if given invalid args; e.g., (log -1.0).
- Previously, they returned NaNs on some platforms but signaled errors
- on others. The affected functions are acos, asin, tan, exp, expt,
- log, log10, sqrt, and mod.
-
- ** New fringe bitmap `exclamation-mark'.
-
- ** Miscellaneous changes to special forms and macros
-
- *** `defun' and `defmacro' are now macros rather than special forms.
-
- *** `kbd' is now a function rather than a macro.
-
- ** Miscellaneous new functions
-
- *** `set-temporary-overlay-map' sets up a temporary keymap that
- takes precedence over most other maps for a short while (normally one key).
-
- *** `autoloadp' tests if its argument is an autoloaded object.
-
- *** `autoload-do-load' performs the autoloading operation.
-
- *** `buffer-narrowed-p' tests if the buffer is narrowed.
-
- *** `file-name-base' returns a file name sans directory and extension.
-
- *** `function-get' fetches a function property, following aliases.
-
- *** `posnp' tests if an object is a `posn'.
-
- *** `system-users' returns the user names on the system.
-
- *** `system-groups' returns the group names on the system.
-
- *** `tty-top-frame' returns the topmost frame of a text terminal.
-
- ** The following functions and variables are obsolete:
- *** `automount-dir-prefix' (use `directory-abbrev-alist')
- *** `buffer-has-markers-at'
- *** `macro-declaration-function' (use `macro-declarations-alist')
- *** `window-system-version' (provides no useful information)
- *** `dired-pop-to-buffer' (use `dired-mark-pop-up')
- *** `query-replace-interactive'
- *** `font-list-limit' (has had no effect since Emacs < 23)
-
- \f
- * Changes in Emacs 24.3 on Non-Free Operating Systems
-
- ** Cygwin builds can use the native MS Windows user interface.
- Pass `--with-w32' to configure. The default remains the X11 interface.
-
- ** Two new functions are available in Cygwin builds:
- `cygwin-convert-file-name-from-windows' and
- `cygwin-convert-file-name-to-windows'. These functions allow Lisp
- code to access the Cygwin file-name mapping machinery to convert
- between Cygwin and Windows-native file and directory names.
-
- ** When invoked with the -nw switch to run on the Windows text-mode terminal,
- Emacs now supports `mouse-highlight', help-echo (in the echo area), and
- `mouse-autoselect-window'.
-
- ** On MS Windows Vista and later Emacs now supports symbolic links.
-
- ** On MS Windows, you can pass `--without-libxml2' to configure.bat to omit
- support for libxml2, even if its presence is detected.
-
- ** On Mac OS X, the Nextstep port requires OS X 10.4 or later.
-
- ** On Mac OS X, configure no longer automatically adds the Fink "/sw"
- directories to the search path. You must add them yourself if you want them.
-
- \f
- * Changes in Emacs 24.2
-
- ** This is mainly a bug-fix release.
-
- \f
- * Installation Changes in Emacs 24.1
-
- ** Emacs can be compiled with Gtk+ 3.0 if you pass --with-x-toolkit=gtk3
- to configure. Note that other libraries used by Emacs, RSVG and GConf,
- also depend on Gtk+. You can disable them with --without-rsvg and
- --without-gconf.
-
- ** Emacs can be compiled with GnuTLS support.
- This happens by default if a suitably recent version of the library is
- found at build time. To prevent this, use the configure option
- `--without-gnutls'. See below for GnuTLS features.
-
- ** Emacs can be compiled with SELinux support.
- This happens by default if a suitably recent version of the library is
- found at build time. To prevent this, use the configure option
- `--without-selinux'. See below for SELinux features.
-
- ** Emacs can be compiled with ImageMagick support.
- This happens by default if a suitably recent version of the library is
- found at build time. To prevent this, use the configure option
- `--without-imagemagick'. See below for ImageMagick features.
- This feature is not available for the Nextstep or MS ports.
-
- ** Emacs can be compiled with libxml2 support.
- This happens by default if a suitably recent version of the library is
- found at build time. To prevent this, use the configure option
- `--without-xml2'. See below for libxml2 features.
-
- ** By default, the installed Info and man pages are compressed.
- You can disable this by configuring --without-compress-info.
-
- ** New configure option --with-wide-int.
- With it, Emacs integers typically have 62 bits, even on 32-bit machines.
- On 32-bit hosts, this raises the limit on buffer sizes from about 512 MiB
- to about 2 GiB.
-
- ** New configure options: --with-mmdf, --with-mail-unlink, --with-mailhost.
- These provide no new functionality, they just remove the need to edit
- lib-src/Makefile by hand in order to use the associated features.
-
- ** New configure option --enable-use-lisp-union-type.
- This is only useful for Emacs developers to debug certain types of bugs.
- This is not a new feature; only the configure flag is new.
-
- ** The standalone programs digest-doc and sorted-doc are removed.
- Emacs now uses Lisp commands `doc-file-to-man' and `doc-file-to-info'.
-
- ** The standalone program `fakemail' is removed.
- If you need it, feedmail.el provides a superset of the functionality.
-
- \f
- * Startup Changes in Emacs 24.1
-
- ** The --unibyte, --multibyte, --no-multibyte, and --no-unibyte
- command line arguments, and the EMACS_UNIBYTE environment variable, no
- longer have any effect. (They were declared obsolete in Emacs 23.)
-
- ** New command line option `--no-site-lisp' removes site-lisp directories
- from load-path. -Q now implies this. This option does not affect the
- EMACSLOADPATH environment variable (and hence has no effect for
- Nextstep builds).
-
- \f
- * Changes in Emacs 24.1
-
- ** Completion
-
- *** Many packages now use the `completion-at-point' command,
- rather than implementing separate completion commands.
-
- *** `completion-at-point' now handles tags and semantic completion.
-
- *** Completion in a non-minibuffer now tries to detect the end of completion
- and pops down the *Completions* buffer accordingly.
-
- *** New option `completion-cycle-threshold' allows completion cycling.
-
- *** New option `completion-category-overrides' for overriding the
- default completion style in certain circumstances.
-
- *** New completion style `substring'.
-
- *** Completion of buffer names uses `substring' completion by default.
-
- *** The option `widget-complete-field' has been removed.
-
- ** Mail changes
-
- *** The first time you try sending mail, Emacs asks for a mail method.
- This is implemented by a new default for `send-mail-function', which
- is `sendmail-query-once'. This offers to use the smtpmail package, or
- to use the old defaults relying on external mail facilities
- (`sendmail-send-it' on GNU/Linux and other Unix-like systems, and
- `mailclient-send-it' on Windows).
-
- *** Typing `C-c m' in the buffer made by `M-x report-emacs-bug'
- transfers the report to your desktop's preferred mail client, if there
- is one. This uses either the "xdg-email" utility, or Mac OS's "open"
- command.
-
- *** See Changes in Specialized Modes and Packages for SMTPmail changes
- and Mail mode changes
-
- ** Emacs server and client changes
-
- *** New option `server-port' specifies the port for TCP Emacs servers.
-
- *** New emacsclient argument -q/--quiet suppresses some status messages.
-
- *** New emacsclient argument --frame-parameters specifies the frame
- parameters of any newly-created graphical frame.
-
- *** If emacsclient shuts down due to Emacs signaling an error,
- its exit status is 1.
-
- *** New emacsclient argument --parent-id ID.
- This opens a client frame in parent X window ID, via XEmbed, similar
- to the --parent-id argument to Emacs.
-
- ** Internationalization changes
-
- *** Emacs now supports display and editing of bidirectional text.
- Right-to-left (RTL) scripts, such as Arabic, Farsi, and Hebrew, are
- displayed in the correct visual order as expected by users of those
- scripts. The display reordering is a "full bidirectionality" class
- implementation of the Unicode Bidirectional Algorithm (UBA). Buffers
- with no RTL text should look exactly the same as before.
-
- **** New buffer-local variable `bidi-display-reordering'.
- To disable display reordering in a buffer, change this to nil.
-
- **** New buffer-local variable `bidi-paragraph-direction'.
- If nil (the default), Emacs determines the base direction of each
- paragraph from its text, as specified by the UBA. Setting the value
- to `right-to-left' or `left-to-right' forces a base direction on each
- paragraph.
-
- Paragraphs with right-to-left base direction are displayed starting at
- the right window edge.
-
- *** Enhanced support for characters with no glyphs in available fonts,
- or, on text terminals, characters that cannot be encoded by the
- terminal coding system. The new option `glyphless-char-display-control'
- specifies how to display them: as a hexadecimal code in a box, a thin
- 1-pixel space, an empty box, etc.
-
- *** New input methods for Farsi and Bulgarian
- (farsi-isiri-9147, farsi-transliterate-banan, bulgarian-alt-phonetic).
-
- *** `nobreak-char-display' now also highlights Unicode hyphen chars
- (U+2010 and U+2011).
-
- *** New Hebrew translation of the Emacs Tutorial.
- Type `C-u C-h t' to choose it in case your language setup doesn't
- automatically select it.
-
- ** An Emacs Lisp package manager is now included.
- This is a convenient way to download and install additional packages,
- from a package repository at http://elpa.gnu.org.
-
- *** M-x list-packages shows a list of packages, which can be
- selected for installation.
-
- *** New command `describe-package', bound to `C-h P'.
-
- *** By default, all installed packages are loaded automatically when
- Emacs starts up. To disable this, set `package-enable-at-startup' to
- nil. To specify the packages to load, customize `package-load-list'.
-
- ** Custom theme changes
-
- *** New command `M-x customize-themes', which provides a convenient
- interface for enabling and disabling Custom themes.
-
- *** New option `custom-theme-load-path' is the load path for themes.
- Emacs no longer looks for Custom themes in `load-path'. The default
- value of `custom-theme-load-path' says to look for themes in
- `custom-theme-directory', followed by a subdirectory of
- `data-directory' named "themes/", which contains a small selection of
- built-in Custom themes.
-
- *** New option `custom-safe-themes' records known-safe theme files.
- If a theme is not in this list, Emacs queries before loading it, and
- offers to save the theme to `custom-safe-themes' automatically. By
- default, all themes included in Emacs are treated as safe.
-
- ** Improved GTK integration
-
- *** GTK scroll-bars are now placed on the right by default.
- The function `set-scroll-bar-mode' can change this.
-
- *** GTK tool bars can have just text, just images or images and text.
- Customize `tool-bar-style' to choose the style. On a Gnome desktop,
- the default is taken from desktop settings.
-
- *** GTK tool bars can be placed on any edge of the frame.
- The frame-parameter tool-bar-position controls this. It takes the
- values top, left, right or bottom. The Options => Show/Hide menu has
- entries for this.
-
- *** The default colors for selected text (the `region' face) are taken
- from the GTK theme when Emacs is built with GTK.
-
- *** Emacs uses GTK tooltips by default if built with GTK.
- You can disable this by changing `x-gtk-use-system-tooltips' to nil.
-
- ** Graphical interface changes
-
- *** On graphical displays, the mode-line no longer ends in dashes.
- Also, the first dash (which does not indicate anything) is just
- displayed as a space.
-
- *** `menu-bar-select-buffer-function' lets you choose another operation
- instead of `switch-to-buffer' when selecting an item in the Buffers menu.
-
- *** Lucid menus and dialogs can display antialiased fonts if Emacs is
- built with Xft. These fonts can be set via X resources, for example:
- Emacs.pane.menubar.font: Courier-12
-
- ** Exiting changes
-
- *** Emacs now calls `kill-emacs' if it receives SIGTERM or SIGHUP,
- or if it receives a SIGINT signal in batch mode.
-
- *** `kill-emacs-hook' is now also run in batch mode.
- Third-party code which adds to `kill-emacs-hook' should check if they
- do the right thing in batch mode.
-
- ** Scrolling changes
-
- *** New scrolling commands `scroll-up-command' and `scroll-down-command'
- (bound to C-v/[next] and M-v/[prior]) do not signal errors at top/bottom
- of buffer at first key-press (instead they move to top/bottom of buffer)
- when `scroll-error-top-bottom' is non-nil.
-
- *** New option `scroll-error-top-bottom' (see above).
-
- *** New scrolling commands `scroll-up-line' and `scroll-down-line'
- scroll a line instead of full screen.
-
- *** New property `scroll-command' should be set on a command's symbol to
- define it as a scroll command affected by `scroll-preserve-screen-position'.
-
- *** If you customize `scroll-conservatively' to a value greater than 100,
- Emacs will never recenter point in the window when it scrolls due to
- cursor motion commands or commands that move point (e.f., `M-g M-g').
- Previously, you needed to use `most-positive-fixnum' as the value of
- `scroll-conservatively' to achieve the same effect.
-
- *** "Aggressive" scrolling now honors the scroll margins.
- If you customize `scroll-up-aggressively' or
- `scroll-down-aggressively' and move point off the window, Emacs now
- scrolls the window so as to avoid positioning point inside the scroll
- margin.
-
- ** Basic SELinux support has been added.
- This requires Emacs to be linked with libselinux at build time.
-
- *** Emacs preserves the SELinux file context when backing up.
- Also, the function `copy-file' has an extra optional argument for
- preserving SELinux context, and the return value of `backup-buffer'
- now includes the SELinux context.
-
- *** New functions `file-selinux-context' and `set-file-selinux-context'
- get and set the SELinux context of a file.
-
- ** Trash changes
-
- *** `delete-by-moving-to-trash' now only affects commands that specify
- trashing. This avoids inadvertently trashing temporary files.
-
- *** Calling `delete-file' or `delete-directory' with a prefix argument
- now forces true deletion, regardless of `delete-by-moving-to-trash'.
-
- ** File- and directory-local variable changes
-
- *** You can stop directory local vars from applying to subdirectories.
- Add an element (subdirs . nil) to the alist portion of any variables
- settings to indicate that the section should not apply to
- subdirectories.
-
- *** Directory local variables can apply to some file-less buffers.
- Affected modes include dired, vc-dir, and log-edit. For example,
- adding "(diff-mode . ((mode . whitespace)))" to .dir-locals.el will
- turn on `whitespace-mode' for *vc-diff* buffers. Modes should call
- `hack-dir-local-variables-non-file-buffer' to support this.
-
- *** Using "mode: MINOR-MODE" to enable a minor mode is deprecated.
- Instead, use "eval: (minor-mode 1)".
-
- *** The variable `inhibit-first-line-modes-regexps' has been renamed
- to `inhibit-local-variables-regexps'. As the name suggests, it now
- applies to ALL file local variables, not just -*- lines. The
- associated `inhibit-first-line-modes-suffixes' has been renamed in the
- corresponding way.
-
- ** Window changes
-
- *** The `quit-window' command now restores the last buffer displayed
- in the quitted window.
-
- *** Resizing an Emacs frame now preserves proportional window sizes,
- modulo restrictions like window minimum sizes and fixed-size windows.
-
- *** The behavior of `display-buffer' is now customizable in detail.
-
- **** New option `display-buffer-base-action' specifies a list of
- user-determined display "actions" (functions and optional arguments
- for choosing the displaying window).
-
- This takes precedence over the default display action, which is
- specified by `display-buffer-fallback-action'.
-
- **** New option `display-buffer-alist' maps buffer name regexps to
- display actions, taking precedence over `display-buffer-base-action'.
-
- *** New option `window-combination-limit'.
- The new option `window-combination-limit' allows to return the space
- obtained for resizing or creating a window more reliably to the window
- from which such space was obtained.
-
- *** New option `window-combination-resize'.
- The new option `window-combination-resize' allows to split a window that
- otherwise cannot be split because it's too small by stealing space from
- other windows in the same combination. Subsequent resizing or deletion
- of the window will resize all windows in the same combination as well.
-
- *** New option `frame-auto-hide-function' lets you choose between
- iconifying or deleting a frame when burying a buffer in a dedicated
- frame, or quitting a window showing a buffer in a frame of its own.
-
- *** New commands `maximize-window' and `minimize-window'.
- These maximize and minimize the size of a window within its frame.
-
- *** New commands `switch-to-prev-buffer' and `switch-to-next-buffer'.
- These functions allow to navigate through the live buffers that have
- been shown in a specific window.
-
- ** Minibuffer changes
-
- *** The inactive minibuffer has its own major mode `minibuffer-inactive-mode'.
- This is handy for minibuffer-only frames, and is also used for the feature
- where mouse-1 pops up *Messages*"', which can now easily be changed.
-
- *** Minibuffers set `truncate-lines' to nil.
- If you want to change the value to something else, you could use
- for example `minibuffer-setup-hook'.
-
- ** `auto-mode-case-fold' is now enabled by default.
-
- ** `backup-by-copying-when-mismatch' now defaults to t.
-
- ** New basic faces `error', `warning', `success'.
- These are used to highlight text indicating failure, caution or
- successful operation.
-
- ** New option `list-colors-sort' defines the color sort order
- for `list-colors-display'.
-
- ** The variable `focus-follows-mouse' now always defaults to nil.
-
- \f
- * Editing Changes in Emacs 24.1
-
- ** Search changes
-
- *** C-y in Isearch is now bound to `isearch-yank-kill', instead of
- `isearch-yank-line'.
-
- *** M-y in Isearch is now bound to `isearch-yank-pop', instead of
- `isearch-yank-kill'.
-
- *** M-s C-e in Isearch is now bound to `isearch-yank-line'.
-
- ** New commands `count-words-region' and `count-words'.
-
- *** M-= is bound to `count-words-region', not `count-lines-region'.
- The `count-words-region' command, when called interactively, reports
- the number of lines, words, and characters in the region. It is a
- superset of the old `count-lines-region', which is now an obsolete
- alias for it.
-
- ** The command `just-one-space' (M-SPC), if given a negative argument,
- also deletes newlines around point.
-
- ** Deletion changes
-
- *** New option `delete-active-region'.
- If non-nil, [delete] and DEL delete the region if it is active and no
- prefix argument is given. If set to `kill', those commands kill
- instead.
-
- *** New command `delete-forward-char', bound to [delete].
- This is meant for interactive use, and obeys `delete-active-region'.
- The command `delete-char' does not obey `delete-active-region'.
-
- *** `delete-backward-char' is now a Lisp function.
- Apart from obeying `delete-active-region', its behavior is unchanged.
- However, the byte compiler now warns if it is called from Lisp; Lisp
- callers should use delete-char with a negative argument instead.
-
- *** The option `mouse-region-delete-keys' has been deleted.
-
- ** Selection changes.
-
- The default handling of clipboard and primary selections has been
- changed to conform with modern X applications. In short, most
- commands for killing and yanking text now use the clipboard, while
- mouse commands use the primary selection.
-
- In the following, we provide a list of these changes, followed by a
- list of steps to get the old behavior back if you prefer that.
-
- *** `select-active-regions' now defaults to t.
- Merely selecting text (e.g. with drag-mouse-1) no longer puts it in
- the kill ring. The selected text is put in the primary selection, if
- the system possesses a separate primary selection facility (e.g. X).
-
- **** `select-active-regions' also accepts a new value, `only'.
- This means to only set the primary selection for temporarily active
- regions (usually made by mouse-dragging or shift-selection);
- "ordinary" active regions, such as those made with C-SPC followed by
- point motion, do not alter the primary selection.
-
- **** `mouse-drag-copy-region' now defaults to nil.
-
- *** mouse-2 is now bound to `mouse-yank-primary'.
- This pastes from the primary selection, ignoring the kill-ring.
- Previously, mouse-2 was bound to `mouse-yank-at-click'.
-
- *** `x-select-enable-clipboard' now defaults to t on all platforms.
-
- *** `x-select-enable-primary' now defaults to nil.
- Thus, commands that kill text or copy it to the kill-ring (such as
- M-w, C-w, and C-k) also use the clipboard---not the primary selection.
-
- **** The "Copy", "Cut", and "Paste" items in the "Edit" menu are now
- exactly equivalent to M-w, C-w, and C-y respectively.
-
- **** Note that on MS-Windows, `x-select-enable-clipboard' was already
- non-nil by default, as Windows does not support the primary selection
- between applications.
-
- *** To return to the previous behavior, do the following:
-
- **** Change `select-active-regions' to nil.
- **** Change `mouse-drag-copy-region' to t.
- **** Change `x-select-enable-primary' to t (on X only).
- **** Change `x-select-enable-clipboard' to nil.
- **** Bind `mouse-yank-at-click' to mouse-2.
-
- *** Support for X cut buffers has been removed.
-
- *** X clipboard managers are now supported.
- To inhibit this, change `x-select-enable-clipboard-manager' to nil.
-
- ** New command `C-x r N' (`rectangle-number-lines') numbers the lines
- in the current rectangle. With a prefix argument, this prompts for a
- number to count from and for a format string.
-
- ** `redisplay-dont-pause' now defaults to t.
- This makes Emacs feel more responsive to editing commands that arrive
- at high rate, e.g. if you lean on some key, because stopping redisplay
- in the middle (when this variable is nil) forces more expensive
- updates later on, and Emacs appears to be unable to keep up.
-
- ** The behavior of <TAB> for active regions in Text mode has changed.
- In Text and related modes, typing <TAB> (`indent-for-tab-command')
- when the region is active causes Emacs to indent all the lines in the
- region, aligning them with the line previous to the first line in the
- region (or with the left margin if there is no previous line).
-
- ** When `occur' is called with a prefix argument, matching strings are
- collected into the `*Occur*' buffer without line numbers. If there
- are parenthesized subexpressions in the specified regexp, `occur'
- reads replacement text that may contain \\& and \\N whose convention
- follows `replace-match'.
-
- \f
- * Changes in Specialized Modes and Packages in Emacs 24.1
-
- ** Archive Mode has basic support for browsing and updating 7z archives.
-
- ** BibTeX mode
-
- *** BibTeX mode now supports biblatex.
- Use the variable `bibtex-dialect' to select different BibTeX dialects.
- `bibtex-entry-field-alist' is now an obsolete alias for
- `bibtex-BibTeX-entry-alist'.
-
- *** New command `bibtex-search-entries', bound to C-c C-a.
-
- *** New `bibtex-entry-format' option `sort-fields', disabled by default.
-
- *** New variable `bibtex-search-entry-globally'.
-
- ** Browse-url
-
- *** New option `browse-url-mailto-function' specifies how to handle "mailto:"s.
-
- *** The default browser used by the package is now the "xdg-open" program,
- on platforms that support it. This calls your desktop's preferred browser.
-
- ** Calc
-
- *** Support for musical notes.
-
- *** Support for logarithmic units.
-
- *** No longer uses the tex prefix for TeX specific unit names when
- using TeX or LaTeX mode.
-
- *** New option to highlight selections using faces.
-
- *** `calc-histogram' has the option of using a vector to determine the bins.
-
- *** New "O" option prefix.
-
- *** Use the "O" prefix to "d r" (`calc-radix') to turn on twos-complement mode.
-
- ** Calendar, Diary, and Appt
-
- *** Diary entries can contain non-printing "comments".
- See the variable `diary-comment-start'.
-
- *** Appointments can specify their individual warning times.
- See the variable `appt-warning-time-regexp'.
-
- *** The function specified by `appt-disp-window-function' may be passed
- lists of arguments if multiple appointments are due at similar times.
- If you are using a custom function for this, you should update it.
-
- *** New function `diary-hebrew-birthday'.
-
- *** Elements of `calendar-day-abbrev-array' and `calendar-month-abbrev-array'
- may no longer be nil, but must all be strings.
-
- *** The obsolete (since Emacs 22.1) method of enabling the appt
- package by adding `appt-make-list' to `diary-hook' has been removed.
- Use `appt-activate' instead.
-
- *** Some appt variables (obsolete since Emacs 22.1) have been removed:
- appt-issue-message (use the function appt-activate)
- appt-visible/appt-msg-window (use the variable appt-display-format)
-
- *** Some diary function aliases (obsolete since Emacs 22.1) have been removed:
- view-diary-entries, list-diary-entries, show-all-diary-entries
-
- ** CC Mode
-
- *** New feature to "guess" the style in an existing buffer.
- The main entry point is M-x c-guess.
-
- *** Java Mode now supports Java 5.0 (Tiger) and 6 (Mustang).
-
- *** `c-beginning-of-defun' and `c-end-of-defun' now respect nested scopes.
- Thus C-M-a will, by default, go to the beginning of the immediate function,
- not the top level.
-
- *** "Macros with semicolons" can be registered for correct indentation.
- Where such a macro ends a line (no semicolon) the next statement is no longer
- parsed as a statement continuation.
-
- ** Comint and modes derived from it use the standard completion code.
-
- ** Compilation mode
-
- *** Compilation mode can be used without Font Lock mode.
- `compilation-parse-errors-function' is now obsolete.
-
- *** New variable `compilation-filter-start', which is bound while
- `compilation-filter-hook' runs. It records the start position of the
- text inserted by `compilation-filter'.
-
- *** `compilation-error-screen-columns' and `compilation-first-column'
- are obeyed in the editing buffer. So programming language modes can
- set them, whereas previously only the value in the *Compilation*
- buffer was used.
-
- ** Customize
-
- *** Customize buffers now contain a search field.
- The search is performed using `customize-apropos'.
- To turn off the search field, set `custom-search-field' to nil.
-
- *** Options in customize group buffers start out hidden if not customized.
- Use the arrow to the left of the option name to toggle visibility.
-
- *** custom-buffer-sort-alphabetically now defaults to t.
-
- *** The color widget now has a "Choose" button, which allows you to
- choose a color via `list-colors-display'.
-
- ** D-Bus
-
- *** It is now possible to access buses other than the default system
- or session bus.
-
- *** The `dbus-register-method' and `dbus-register-property' functions
- optionally do not register names.
-
- *** The new function `dbus-register-service' registers a known service
- name on a D-Bus without also registering a property or a method.
-
- ** Dired-x
-
- *** C-x C-j (`dired-jump') and C-x 4 C-j (`dired-jump-other-window'),
- if called with a prefix argument, read a file name from the minibuffer
- instead of using the current buffer.
-
- *** The "dired local variables" feature of Dired-x is obsolete.
- The standard directory local variables feature replaces it.
-
- ** ERC changes
-
- *** New options `erc-autojoin-timing' and `erc-autojoin-delay',
- controlling attempts to autojoin a channel.
-
- *** New variable `erc-coding-system-precedence': If we use `undecided'
- as the server coding system, this variable will then be consulted.
- The default is to decode strings that can be decoded as utf-8 as
- utf-8, and do the normal `undecided' decoding for the rest.
-
- ** Eshell changes
-
- *** The default value of `eshell-directory-name' has changed
- to be an "eshell" directory in `user-emacs-directory'.
- The old "~/.eshell/" directory is still used if it exists, though.
-
- ** gdb-mi
-
- *** The M-x gdb command now uses the GDB Machine Interface protocol.
- It now supports multithread non-stop debugging and simultaneous
- debugging of several threads.
-
- ** Image mode
-
- *** RET (`image-toggle-animation') toggles animation, if applicable.
- Animation plays once, unless the option `image-animate-loop' is non-nil.
-
- ** Info
-
- *** New command M-x info-display-manual displays a named Info manual.
- If that manual is already visited in some Info buffer, it displays
- that buffer. (This is handy if you have many manuals in many *info*
- buffers, and don't remember the name of the buffer visiting the manual
- you want to consult.) Otherwise, it loads and displays the manual.
-
- *** `e' is now bound to `end-of-buffer' rather than to `Info-edit'.
- This is for compatibility with the stand-alone Info reader program,
- and also because `Info-edit' is a rarely used command that is disabled
- by default.
-
- ** Mail mode changes (not Message mode)
-
- *** New command M-x mail-add-attachment for adding MIME attachments
-
- *** The command M-x mail-attach-file was renamed to M-x mail-insert-file.
- (Its name is misleading, since it has nothing to do with MIME
- attachments.) The old name is now an obsolete alias to the new name.
-
- ** MH-E has been updated to MH-E version 8.3.1.
- See MH-E-NEWS for details.
-
- ** Modula-2 mode provides auto-indentation.
-
- ** mpc.el: Can use pseudo tags of the form tag1|tag2 as a union of two tags.
-
- ** nXML mode no longer binds C-RET to `nxml-complete'.
- Completion is now performed via `completion-at-point', bound to C-M-i
- or M-TAB. If `nxml-bind-meta-tab-to-complete-flag' is non-nil (the
- default), this performs tag completion.
-
- ** Org mode has been updated to version 7.8.09.
- See ORG-NEWS for details.
-
- ** Prolog mode has been completely revamped, with lots of additional
- functionality such as more intelligent indentation, electricity,
- support for more variants, including Mercury, and a lot more.
-
- ** Rmail
-
- *** The command `rmail-epa-decrypt' decrypts OpenPGP data
- in the Rmail incoming message.
-
- *** The variable `rmail-message-filter' no longer has any effect.
- This change was made in Emacs 23.1 but was not advertised at the time.
- Try using `rmail-show-message-hook' instead.
-
- ** Shell mode
-
- *** M-x shell prompts for the shell path name if the default directory
- is a remote file name and neither the environment variable $ESHELL nor
- the variable `explicit-shell-file-name' is set.
-
- *** TAB is now bound to the standard `completion-at-point' command,
- which now implements the pcomplete rules for shell command completion.
-
- ** SMTPmail
-
- *** SMTPmail now uses encrypted connections (via STARTTLS) by default
- if the mail server supports them. This uses either built-in GnuTLS
- support, or the starttls.el library. Customize `smtpmail-stream-type'
- to change this.
-
- *** The variable `smtpmail-auth-credentials' has been removed.
- By default, the information is now stored in the file ~/.authinfo.
- This was the default value of smtpmail-auth-credentials. If you had
- customized smtpmail-auth-credentials to a list of user names and
- passwords, those settings are not used. During your first connection
- to the smtp server, Emacs will prompt for the user name and password,
- and offer to save them to ~/.authinfo. Or you can manually copy the
- credentials to ~/.authinfo. For example, if you had
-
- (setq smtpmail-auth-credentials
- '(("mail.example.org" 25 "jim" "s!cret")))
-
- then the equivalent line in ~/.authinfo would be
-
- machine mail.example.org port 25 login jim password s!cret
-
- See the auth-source manual for more information, e.g. on encrypting
- the credentials file.
-
- *** The variable `smtpmail-starttls-credentials' has been removed.
- If you had that set, you need to put
-
- machine smtp.whatever.foo port 25 key "~/.my_smtp_tls.key" cert "~/.my_smtp_tls.cert"
-
- in your ~/.authinfo file instead.
-
- *** SMTPmail defaults to using the address in the From: header as the
- SMTP MAIL FROM envelope. To override this, set `mail-envelope-from'
- to the address you wish to use instead.
-
- ** SQL mode
-
- *** New options `sql-port', `sql-connection-alist', `sql-send-terminator',
- and `sql-oracle-scan-on'.
-
- *** New options controlling prompting for login parameters.
- Each supported product has a custom variable `sql-*-login-params',
- which is a list of the parameters to be prompted for before a
- connection is established.
-
- *** The command `sql-product-interactive' now takes a prefix argument,
- which causes it to prompt for an SQL product.
-
- *** Product-specific SQL interactive commands now take prefix arguments.
- These commands (`sql-sqlite', `sql-postgres', `sql-mysql', etc.),
- given a prefix argument, prompt for a name for the SQL interactive
- buffer. This reduces the need for calling `sql-rename-buffer'.
-
- *** SQL interactive modes suppress command continuation prompts, and
- replace tabs with spaces. The first change impacts multiple line SQL
- statements entered with C-j between each line, statements yanked into
- the buffer and statements sent with `sql-send-*' functions. The
- second prevents the MySQL and Postgres interpreters from listing
- object name completions when sent text via `sql-send-*' functions.
-
- *** New command `sql-connect' starts a predefined SQLi session,
- using the login parameters from `sql-connection-alist'.
-
- *** New "Save Connection" menu item in SQLi buffers.
- This gathers the login params specified for the SQLi session, if it
- was not started by a connection, and saves them as a new connection.
-
- *** New commands for listing database objects and details:
- sql-list-all and sql-list-table.
-
- *** An API for manipulating SQL product definitions has been added.
-
- ** TeX modes
-
- *** latex-electric-env-pair-mode keeps \begin..\end matched on the fly.
-
- ** Tramp
-
- *** New inline access method "ksu" (kerberized su).
-
- *** The following access methods are discontinued: "ssh1_old",
- "ssh2_old", "scp1_old", "scp2_old", "imap", "imaps" and "fish".
-
- *** The user option `remote-file-name-inhibit-cache' controls whether
- remote file attributes are cached for better performance.
-
- *** The option `ange-ftp-binary-file-name-regexp' has changed its
- default value to "".
-
- *** Handlers for `file-selinux-context' and `set-file-selinux-context'
- for remote machines which support SELinux.
-
- ** New function `url-queue-retrieve', which behaves like url-retrieve,
- but with limits (`url-queue-parallel-processes', `url-queue-timeout') on
- the degree of parallelism.
-
- ** VC and related modes
-
- *** Support for pulling on distributed version control systems.
- The command C-x v + (`vc-pull') runs a "pull" operation, if it is
- supported (currently with Bzr, Git, and Mercurial), to update the
- current branch and working tree. A prefix argument means to prompt
- the user for specifics, e.g. a pull location.
-
- *** `vc-update' is now an alias for `vc-pull'.
-
- *** Support for merging on distributed version control systems.
- The command C-x v m (`vc-merge') now runs a "merge" operation, if it
- is supported (currently with Bzr, Git, and Mercurial), to merge
- changes from another branch into the current one. It prompts for
- specifics, e.g. a merge source.
-
- *** New option `vc-revert-show-diff' controls whether `vc-revert'
- shows a diff while querying the user. It defaults to t.
-
- *** Log entries in some Log View buffers can be toggled to display a
- longer description by typing RET (log-view-toggle-entry-display).
- This is currently supported for Bzr, Git, and Mercurial (to support
- another backend, define a `log-view-expanded-log-entry-function').
- In the Log View buffers made by C-x v L (`vc-print-root-log'), you can
- use this to display the full log entry for the revision at point.
-
- *** New command `vc-ediff' allows visual comparison of two revisions
- of a file similar to `vc-diff', but using ediff backend.
-
- *** The option `vc-initial-comment' was removed in Emacs 23.2, but
- this was not advertised at the time.
-
- *** `vc-toggle-read-only' is an obsolete alias for `toggle-read-only'.
- Since Emacs 23, it has done the same thing as `toggle-read-only', but
- this was not advertised at the time.
-
- ** Obsolete modes
-
- *** abbrevlist.el
-
- *** erc-hecomplete.el (use erc-pcomplete.el instead)
-
- *** partial-completion-mode (complete.el) is obsolete.
- You can get a comparable behavior with:
- (setq completion-styles '(partial-completion initials))
- (setq completion-pcm-complete-word-inserts-delimiters t)
-
- *** pc-mode.el is obsolete (CUA mode is much more comprehensive).
-
- *** pgg is obsolete (use EasyPG instead).
-
- *** sregex.el is obsolete, since rx.el is a strict superset.
-
- *** s-region.el and pc-select.el are obsolete.
- They are superseded by shift-select-mode, enabled by default since 23.1.
-
- *** vc-mcvs.el is obsolete (for lack of a maintainer).
-
- ** Miscellaneous
-
- *** The Landmark game is now invoked with `landmark', not `lm'.
- Its functions and variables have been similarly renamed.
-
- *** In `ido-file-completion-map', C-v is no longer bound to `ido-toggle-vc'.
- (This interfered with cua-mode.)
-
- *** f90.el has some support for Fortran 2008 syntax.
-
- *** `copyright-fix-years' can optionally convert consecutive years to ranges.
-
- *** New command `nato-region' converts text to NATO phonetic alphabet.
-
- \f
- * New Modes and Packages in Emacs 24.1
-
- ** Occur Edit mode applies edits made in *Occur* buffers to the
- original buffers. It is bound to "e" in Occur mode.
-
- ** New global minor mode electric-pair-mode.
- When enabled, typing an open parenthesis automatically inserts the
- matching closing one.
-
- ** New global minor mode electric-indent-mode.
- When enabled, typing certain characters triggers reindentation.
- Major modes wishing to use this can set electric-indent-chars or
- electric-indent-functions.
-
- ** New global minor mode electric-layout-mode.
- When enabled, typing certain characters automatically inserts newlines.
- Major modes wishing to use this can set electric-layout-rules.
-
- ** tabulated-list.el provides a generic major mode for tabulated data,
- from which other modes can be derived.
-
- ** pcase.el provides the ML-style pattern matching macro `pcase'.
-
- ** secrets.el is an implementation of the Secret Service API, an
- interface to password managers like GNOME Keyring or KDE Wallet. The
- Secret Service API requires D-Bus for communication. The command
- `secrets-show-secrets' offers a buffer with a visualization of the
- secrets.
-
- ** notifications.el provides an implementation of the Desktop
- Notifications API. It requires D-Bus for communication.
-
- ** soap-client.el supports access to SOAP web services from Emacs.
- soap-inspect.el is an interactive inspector for SOAP WSDL structures.
-
- ** New generic mode, xmodmap-generic-mode, for xmodmap files.
-
- ** New emacs-lock.el package.
- The previous version has been moved to obsolete/old-emacs-lock.el.
- Now, there is a proper minor mode `emacs-lock-mode'. Protection
- against exiting Emacs and killing the buffer can be set separately.
- The mechanism for automatically turning off protection for buffers
- with dead inferior processes has been generalized.
-
- \f
- * Incompatible Lisp Changes in Emacs 24.1
-
- ** Passing a nil argument to a minor mode function call now ENABLES
- the minor mode unconditionally. This is so that you can write e.g.
-
- (add-hook 'text-mode-hook 'foo-mode)
-
- to enable foo-mode in Text mode buffers, removing the need for
- `turn-on-foo-mode' style functions. This affects all mode commands
- defined by `define-minor-mode'. If called interactively, the mode
- command still toggles the minor mode.
-
- ** The return value of `backup-buffer' has changed.
- It is now a list of three elements, where the second element is a list
- describing the original file's SELinux context. If Emacs or the
- system lacks SELinux support, the context list is (nil nil nil nil).
- See "Basic SELinux support" above, under "Changes in Emacs 24.1".
-
- ** `char-direction-table' and the `char-direction' function were deleted.
- They were buggy and inferior to the new support of bidirectional
- editing introduced in Emacs 24. If you need the bidirectional
- properties of a character, use `get-char-code-property' with the last
- argument `bidi-class'.
-
- ** `copy-directory' now copies the source directory as a subdirectory
- of the target directory, if the latter is an existing directory. The
- new optional arg COPY-CONTENTS, if non-nil, makes the function copy
- the contents directly into a pre-existing target directory.
-
- ** For mouse click input events in the text area, the Y pixel
- coordinate in the POSITION list now counts from the top of the text
- area, excluding any header line. Previously, it counted from the top
- of the header line.
-
- ** Support for "old-style" backquotes, obsolete for 10+ years, has
- been further reduced. Now a backquote not followed by a space is
- always treated as a "new-style" backquote. Please remove all
- "old-style" backquotes from your code. If your code uses backquotes
- as documented in the Elisp manual, and compiles without warning, then
- you have nothing to do in this regard. Code not following the
- appropriate conventions may fail to compile.
-
- The most common cause of trouble seems to be an old-style backquote
- followed by a newline. Another cause of trouble is vector notation
- for key sequence notation: instead of [(control ,)] and [(control ')],
- you should write [(control ?,)] and [(control ?')], which will work in
- older Emacsen too.
-
- ** The macro `eval-at-startup' was removed in Emacs 23.2, but this
- was not advertised at the time. The function `custom-initialize-delay'
- replaced all known uses.
-
- ** `view-buffer' now treats special mode-class in the same way that
- `view-file' has since Emacs 22 (i.e. it won't enable View mode if the
- major mode is special).
-
- ** Menu and tool bar changes
-
- *** During startup, Emacs no longer adds entries for `menu-bar-lines'
- and `tool-bar-lines' to `default-frame-alist' and `initial-frame-alist'.
- With these alist entries omitted, `make-frame' checks the value of the
- variable `menu-bar-mode'/`tool-bar-mode' to determine whether to create
- a menu-bar or tool-bar, respectively. If the alist entries are added,
- they override the value of `menu-bar-mode'/`tool-bar-mode'.
-
- *** The menu bar bindings's caches are not used any more.
- Use (where-is-internal <def> nil t) instead.
-
- ** Regions created by mouse dragging are now normal active regions,
- similar to those created by shift-selection (see Selection changes
- above). In previous Emacs versions, these regions were delineated by
- `mouse-drag-overlay'; that variable has been removed.
-
- ** The fourth argument of `filter-buffer-substring' has been removed.
- If you want to remove text properties from the final result, simply
- pass the result through substring-no-properties.
-
- ** cl.el no longer provides `cl-19'.
-
- ** The following obsolete functions and aliases have been removed
- (the appropriate new function is given in parentheses; "not needed"
- means you can just remove all calls to the function in question):
-
- *** `comint-kill-output' (`comint-delete-output')
- *** `decompose-composite-char' (`char-to-string')
- *** `outline-visible' (`outline-invisible-p')
- *** `internal-find-face' (`facep')
- *** `internal-get-face' (`facep and check-face')
- *** `frame-update-faces' (not needed)
- *** `frame-update-face-colors' (`frame-set-background-mode')
- *** `x-frob-font-weight' and `x-frob-font-slant' (`make-face-*' functions)
- *** `x-make-font-bold' and `x-make-font-demibold' (`make-face-bold')
- *** `x-make-font-italic' and `x-make-font-oblique' (`make-face-italic')
- *** `x-make-font-bold-italic' (`make-face-bold-italic')
- *** `x-make-font-unbold' (`make-face-unbold')
- *** `x-make-font-unitalic' (`make-face-unitalic')
- *** `mldrag-drag-mode-line' (`mouse-drag-mode-line')
- *** `mldrag-drag-vertical-line' (`mouse-drag-vertical-line')
- *** `iswitchb-default-keybindings' (`iswitchb-mode')
- *** `char-bytes' (== 1)
- *** `isearch-return-char' (`isearch-printing-char')
- *** `make-local-hook' (not needed)
- *** `set-screen-height' (`set-frame-height')
- *** `set-screen-width' (`set-frame-width')
-
- ** The following obsolete variables and varaliases have been removed
- (the appropriate new variable is given in parentheses):
-
- *** `checkdoc-minor-keymap' (`checkdoc-minor-mode-map')
- *** `vc-header-alist' (`vc-BACKEND-header')
- *** `directory-sep-char' (== ?/)
- *** `font-lock-defaults-alist' (`font-lock-defaults')
- *** `e' (`float-e').
-
- ** The following obsolete files were removed:
- sc.el, x-menu.el, rnews.el, rnewspost.el
-
- ** The format of the finder-inf.el file has changed, since the Finder
- mechanism is now based on the package system. The variable
- `finder-package-info' is replaced by `package--builtins' and
- `finder-keywords-hash'.
-
- ** When generating autoloads, `update-directory-autoloads' no longer
- assumes every inspected file is in your `load-path'. It instead
- generates relative names according to the current `load-path'.
-
- \f
- * Lisp Changes in Emacs 24.1
-
- ** Code can now use lexical scoping by default instead of dynamic scoping.
- The `lexical-binding' variable enables lexical scoping for local
- variables. It is typically set via a file-local variable in the first
- line of the file, in which case it applies to all the code in that
- file.
-
- *** `eval' takes a new optional argument `lexical' to choose the new lexical
- binding instead of the old dynamic binding mode.
-
- *** Lexically scoped interpreted functions are represented with a new form
- of function value which looks like (closure ENV ARGS &rest BODY).
-
- *** New macro `letrec' to define recursive local functions.
-
- *** `defvar' and `defconst' now mark the variable as special (dynamic).
- So do `defcustom' and other forms that call `defvar' as a subroutine.
-
- *** New function `special-variable-p' to check whether a variable is
- declared as dynamically bound.
-
- *** The form ((lambda ...) ...) is deprecated.
-
- ** An Emacs Lisp testing tool is now included.
- Emacs Lisp developers can use this tool to write automated tests for
- their code. See the ERT info manual for details.
-
- ** Changes for bidirectional display and editing
-
- *** New function `current-bidi-paragraph-direction'.
- This returns the base direction of the paragraph at point.
-
- *** New function `bidi-string-mark-left-to-right'.
- Given a string containing characters from right-to-left scripts, this
- function returns another string which can be safely inserted into a
- buffer, such that any following text will be always displayed to the
- right of that string. (This works by appending an invisible Unicode
- "LEFT-TO-RIGHT MARK" character if the argument string might need it.)
-
- This is useful when the buffer has overall left-to-right paragraph
- direction and you need to insert a string whose contents are not known
- in advance, without disrupting the layout of the line.
-
- ** Window changes
-
- *** Window tree functions are accessible in Elisp.
- Functions are provided to return the parent, siblings or child windows
- of any window including internal windows (windows not associated with a
- buffer) in the window tree.
-
- **** New function `window-valid-p' gives non-nil for live and internal
- windows.
-
- **** Window manipulation can deal with internal windows.
- Many window handling functions like `split-window', `delete-window', or
- `delete-other-windows' as well as the window resizing functions can now
- act on any window including internal ones.
-
- *** window-total-height/-width vs window-body-height/-width.
- The function `window-height' has been renamed to `window-total-height'
- and `window-width' has been renamed to `window-body-width'. The old
- names are provided as aliases. Two new functions `window-total-width'
- and `window-body-height' are provided.
-
- *** Window parameters specific to window handling functions.
- For each window you can specify a parameter to override the default
- behavior of a number of functions like `split-window', `delete-window'
- and `delete-other-windows'. The variable `ignore-window-parameters'
- allows to ignore processing such parameters.
-
- *** New semantics of third argument of `split-window'.
- The third argument of `split-window' has been renamed to SIDE and can be
- set to any of the values 'below, 'right, 'above, or 'left to make the
- new window appear on the corresponding side of the window that shall be
- split. Any other value of SIDE will cause `split-window' to split the
- window into two side-by-side windows as before.
-
- *** Window resizing functions.
- A new standard function for resizing windows called `window-resize' has
- been introduced. This and all other functions for resizing windows no
- longer delete any windows when they become too small.
-
- *** Deleting the selected window now selects the most recently selected
- live window on that frame instead.
-
- *** `adjust-window-trailing-edge' adjustments.
- `adjust-window-trailing-edge' can now deal with fixed-size windows and
- is able to resize other windows if a window adjacent to the trailing
- edge cannot be shrunk any more. This makes its behavior more similar to
- that of Emacs 21 without compromising, however, its inability to delete
- windows which was introduced in Emacs 22.
-
- *** Window-local buffer lists.
- Windows now have local buffer lists. This means that removing a buffer
- from display in a window will preferably show the buffer previously
- shown in that window with its previous window-start and window-point
- positions. This also means that the same buffer may be automatically
- shown twice even if it already appears in another window.
-
- *** `switch-to-buffer' has a new optional argument FORCE-SAME-WINDOW,
- which if non-nil requires the buffer to be displayed in the currently
- selected window, signaling an error otherwise. If nil, another window
- can be used, e.g. if the selected one is strongly dedicated.
-
- *** `split-window-vertically' and `split-window-horizontally' renamed
- to `split-window-below' and `split-window-right' respectively.
- The old names are kept as aliases.
-
- *** Display actions
-
- **** The second arg to `display-buffer' and `pop-to-buffer' is now
- named ACTION, and takes a display action of the same form as
- `display-buffer-base-action' (see Changes, above). A non-nil,
- non-list value is treated specially, as the old meaning.
-
- **** New variable `display-buffer-overriding-action'.
-
- **** The procedure of `display-buffer' etc. to choose a window is
- determined by combining `display-buffer-overriding-action',
- `display-buffer-alist', the ACTION arg, `display-buffer-base-action',
- and `display-buffer-fallback-action'. The second and fourth of these
- are user-customizable variables.
-
- See the docstring of `display-buffer' for details.
-
- *** New functions `window-state-get' and `window-state-put'.
- These functions allow to save and restore the state of an arbitrary
- frame or window as an Elisp object.
-
- ** Completion
-
- *** New variable `completion-extra-properties' used to specify extra
- properties of the current completion:
- - :annotate-function, same as the old completion-annotate-function.
- - :exit-function, function to call after completion took place.
-
- *** Functions on `completion-at-point-functions' can return any of the
- properties valid for `completion-extra-properties'.
-
- *** `completion-annotate-function' is obsolete.
-
- *** New `metadata' method for completion tables. The metadata thus returned
- can specify various details of the data returned by `all-completions':
- - `category' is the kind of objects returned (e.g., `buffer', `file', ...),
- used to select a style in completion-category-overrides.
- - `annotation-function' to add annotations in *Completions*.
- - `display-sort-function' to specify how to sort entries in *Completions*.
- - `cycle-sort-function' to specify how to sort entries when cycling.
-
- *** `minibuffer-local-filename-must-match-map' is not used any more.
- Instead, the bindings in `minibuffer-local-filename-completion-map'
- are combined with `minibuffer-local-must-match-map'.
-
- *** New variable `completing-read-function' allows overriding the
- behavior of `completing-read'.
-
- ** `glyphless-char-display' can now distinguish between graphical and
- text terminal display, via a char-table entry that is a cons cell.
-
- ** `pre-command-hook'/`post-command-hook' are not reset to nil on error.
- Instead, the offending function is removed.
-
- ** New hook types
-
- *** New function `run-hook-wrapped' for running an abnormal hook by
- passing the hook functions as arguments to a "wrapping" function.
- Like `run-hook-with-args-until-success', it stops at the first
- non-nil return value.
-
- *** New macro `with-wrapper-hook' for running an abnormal hook as a
- set of "wrapping" filters, similar to around advice.
- (A version of this macro was actually added in Emacs 23.2 but was not
- advertised at the time.)
-
- ** Debugger changes
-
- *** New macro `condition-case-unless-debug' (this was actually added in
- Emacs 23.1 as condition-case-no-debug, but not advertised)
-
- *** The macro `with-demoted-errors' was added in Emacs 23.1, but not advertised.
-
- *** Variable `stack-trace-on-error' removed.
-
- *** The debugger can now "continue" from an error, which means it will
- jump to the error handler as if the debugger had not been invoked
- instead of jumping all the way to the top-level.
-
- *** Set `debug-on-event' to enter the debugger on events like SIGUSR1.
- This can be useful when `inhibit-quit' is set.
-
- ** The new function `server-eval-at' allows evaluation of Lisp forms on
- named Emacs server instances.
-
- ** `call-process' and `call-process-region' allow a `(:file "file")' spec
- to redirect STDOUT to a file.
-
- ** The function `format-time-string' now supports the %N directive,
- for higher-resolution time stamps.
-
- ** New input reading functions
-
- *** New function `read-char-choice' reads a restricted set of
- characters, discarding any inputs not inside the set.
-
- *** The command `read-color' now requires a match for a color name
- or RGB triplet, instead of signaling an error if the user provides
- invalid input.
-
- **** `facemenu-read-color' is now an alias for `read-color'.
-
- ** `image-library-alist' is renamed to `dynamic-library-alist'.
- The variable is now used to load all kind of supported dynamic libraries,
- not just image libraries. The previous name is still available as an
- obsolete alias.
-
- ** Syntax parsing changes
-
- *** New variable `syntax-propertize-function'.
- This replaces `font-lock-syntactic-keywords' which is now obsolete.
- This allows syntax-table properties to be set independently from font-lock:
- just call syntax-propertize to make sure the text is propertized.
- Together with this new variable come a new hook
- syntax-propertize-extend-region-functions, as well as two helper functions:
- syntax-propertize-via-font-lock to reuse old font-lock-syntactic-keywords
- as-is; and syntax-propertize-rules which provides a new way to specify
- syntactic rules.
-
- *** Syntax tables support a new "comment style c" additionally to style b.
-
- ** New hook `post-self-insert-hook', run after `self-insert-command'.
-
- ** frame-local variables cannot be let-bound any more.
-
- ** Major and minor mode changes
-
- *** `set-auto-mode' now respects mode: local variables at the end of files,
- as well as those in the -*- line.
-
- *** `prog-mode' is a new major mode from which programming modes
- should be derived.
-
- **** `prog-mode-hook' can be used to enable features for programming
- modes, e.g. (add-hook 'prog-mode-hook 'flyspell-prog-mode) to enable
- on-the-fly spell checking for comments and strings.
-
- *** New hook `change-major-mode-after-body-hook', run by
- `run-mode-hooks' just before any other mode hooks.
-
- *** Enabled globalized minor modes can be disabled in specific major modes.
- If the global mode is global-FOO-mode, then run (FOO-mode -1) in the
- major mode's hook, where FOO-mode toggles the mode on a per-buffer basis.
-
- *** `define-minor-mode' accepts new keywords :variable, :after-hook.
-
- ** File-handling changes
-
- *** `delete-file' and `delete-directory' now accept optional arg TRASH.
- Trashing is performed if TRASH and `delete-by-moving-to-trash' are
- both non-nil. Interactively, TRASH defaults to t, unless a prefix
- argument is supplied (see Trash changes, above).
-
- *** New file predicates: `file-equal-p', `file-in-directory-p'.
-
- ** Tool-bars can display separators.
- Tool-bar separators are handled like menu separators in menu-bar maps,
- i.e. via menu entries of the form `(menu-item "--")'.
-
- ** Image API
-
- *** Animated images support (currently animated gifs only).
-
- **** `image-animated-p' returns non-nil if an image can be animated.
-
- **** `image-animate' animates a supplied image spec.
-
- **** `image-animate-timer' returns the timer object for an image that
- is being animated.
-
- *** `image-extension-data' has been renamed to `image-metadata'.
- The old name is an obsolete alias to the new one.
-
- *** Image mode can view any image type that ImageMagick supports.
- This requires Emacs to be built with ImageMagick support.
-
- **** New function `imagemagick-types', defined if ImageMagick support
- is enabled, returns a list of image file extensions that your
- ImageMagick installation supports.
-
- **** New function `imagemagick-register-types' enables ImageMagick
- image types in Image mode and in `create-image' and other helper
- functions.
-
- **** New option `imagemagick-types-inhibit' excludes certain
- ImageMagick image types from `imagemagick-register-types'.
-
- **** With ImageMagick support, there are extra Image mode commands to
- resize and rotate images: `image-transform-fit-to-height',
- `image-transform-fit-to-width', `image-transform-set-rotation', and
- `image-transform-set-scale'.
-
- ** `compose-mail' now accepts an optional 8th arg, RETURN-ACTION, and
- passes it to the mail user agent function. This argument specifies an
- action for returning to the caller after finishing with the mail. For
- example, this is used by Rmail to optionally delete a mail window.
-
- ** XML and HTML parsing
- If Emacs is compiled with libxml2 support, there are two new
- functions: `libxml-parse-html-region' (which parses "real world" HTML)
- and `libxml-parse-xml-region' (which parses XML). Both return an
- Emacs Lisp parse tree.
-
- ** Networking and encryption changes
-
- *** `open-network-stream' can now be used to open an encrypted stream.
- It now accepts an optional `:type' parameter for initiating a TLS
- connection, directly or via STARTTLS. To do STARTTLS, additional
- parameters (`:end-of-command', `:success', `:capabilities-command')
- must also be supplied.
-
- *** New library gnutls.el.
- The new function `gnutls-available-p' returns non-nil if Emacs is
- built with GnuTLS support. The main entry points are
- `open-gnutls-stream' and `gnutls-negotiate'. It's easiest to use
- these functions through `open-network-stream', because that can
- upgrade connections through STARTTLS opportunistically or use plain
- SSL, depending on your needs. For debugging, set `gnutls-log-level'
- greater than 0.
-
- *** New primitive `secure-hash' that supports many secure hash algorithms:
- md5, sha1, sha2, sha224, sha256, sha384, and sha512. The lisp library
- sha1.el has been removed. The `sha1' feature is provided by default.
-
- ** Isearch
-
- *** New hook `isearch-update-post-hook' that runs in `isearch-update'.
-
- ** Progress reporters can now "spin".
- The MIN-VALUE and MAX-VALUE arguments of `make-progress-reporter' can
- now be nil, or omitted. This makes a "non-numeric" reporter. Each
- time you call `progress-reporter-update' on that progress reporter,
- with a nil or omitted VALUE argument, the reporter message is
- displayed with a "spinning bar".
-
- ** New variable `revert-buffer-in-progress-p' is true while a buffer is
- being reverted, even if the buffer has a local `revert-buffer-function'.
-
- ** New variables `delayed-warnings-list' and `delayed-warnings-hook'.
- If delayed-warnings-list is non-nil, the command loop calls
- `delayed-warnings-hook' after `post-command-hook'. At present, this
- is only used by Emacs on some platforms to display warnings during
- startup, which might otherwise not be noticed. This uses the
- functions `display-delayed-warnings' and `collapse-delayed-warnings'.
-
- ** rx.el has a new `group-n' construct for explicitly numbered groups.
-
- ** New function `make-composed-keymap' that constructs a new keymap
- from multiple input maps. You can use this to make a keymap that
- inherits from multiple maps, eg:
- (set-keymap-parent newmap (make-composed-keymap othermap parent))
-
- ** New function `string-prefix-p'.
- (This was actually added in Emacs 23.2 but was not advertised at the time.)
-
- ** New reader macro ## that stands for the empty symbol.
- This means that the empty symbol can now be read back. Also, #: by itself
- (when not immediately followed by a possible symbol character) stands for
- an empty uninterned symbol.
-
- ** New math functions `isnan', `copysign', `frexp', `ldexp'.
-
- ** The following functions and variables are obsolete:
-
- *** `tooltip-use-echo-area' is obsolete.
- Rather than setting this to t, disable Tooltip mode instead.
-
- *** buffer-substring-filters is obsolete.
- Use `filter-buffer-substring-functions' instead.
-
- *** `byte-compile-disable-print-circle' is obsolete.
-
- *** `deferred-action-list' and `deferred-action-function' are obsolete.
- Use `post-command-hook' instead.
-
- *** `font-lock-maximum-size' is obsolete.
-
- \f
- * Changes in Emacs 24.1 on Non-Free Operating Systems
-
- ** On MS Windows, Emacs warns when using the obsolete init file _emacs,
- and also when HOME is set to C:\ by default.
-
- ** New configure.bat options
-
- *** --enable-checking builds Emacs with extra runtime checks.
-
- *** --distfiles specifies files to be included in binary distribution.
-
- *** --without-gnutls disables automatic GnuTLS detection.
-
- *** --lib for general library linkage, works with the USER_LIBS build variable.
-
- ** New make target `dist' to create binary distribution for MS Windows.
-
- ** The Lisp function `w32-default-color-map' is now obsolete.
- (It is only used internally in the Emacs C code.)
-
- ** Customize ns-auto-hide-menu-bar to have the menu-bar hidden, but
- reappear on mouse-over. (Requires OS X 10.6 or later.)
-
- ** On Mac OS X, dragging a file into Emacs visits the file, like on
- other platforms, rather than inserting its contents into the buffer.
+ ** Building Emacs on OSX with Coca (--with-ns) now requires 10.6 or newer.
+ PowerPC on OSX is not supported.
\f
----------------------------------------------------------------------