Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
For older news, see the file ONEWS
+You can narrow news to the specific version by calling
+`view-emacs-news' with a prefix argument or by typing C-u C-h C-n.
Temporary note:
+++ indicates that the appropriate manual has already been updated.
When you add a new item, please add it without either +++ or ---
so we will look at it and add it to the manual.
+Fixme: The notes about Emacs 22 are quite incomplete.
+
+\f
+* Changes in Emacs 22.1
+
+** The Emacs character set is now a superset of Unicode.
+(It has about four times the code space, which should be plenty).
+
+The internal encoding used for buffers and strings is now
+Unicode-based and called `utf-8-emacs'. utf-8-emacs is backwards
+compatible with the UTF-8 encoding of Unicode. The `emacs-mule'
+coding system can still read and write data in the old internal
+encoding.
+
+There are still charsets which contain disjoint sets of characters
+where this is necessary or useful, especially for various Far Eastern
+sets which are problematic with Unicode.
+
+Since the internal encoding is also used by default for byte-compiled
+files -- i.e. the normal coding system for byte-compiled Lisp files is
+now utf-8-Emacs -- Lisp containing non-ASCII characters which is
+compiled by Emacs 22 can't be read by earlier versions of Emacs.
+Files compiled by Emacs 20 or 21 are loaded correctly as emacs-mule
+(whether or not they contain multibyte characters), which makes
+loading them somewhat slower than Emacs 22-compiled files. Thus it
+may be worth recompiling existing .elc files which don't need to be
+shared with older Emacsen.
+
+** There are assorted new coding systems/aliases -- see
+M-x list-coding-systems.
+
+** New charset implementation with many new charsets.
+See M-x list-character-sets. New charsets can be defined conveniently
+as tables of unicodes.
+
+The dimension of a charset is now 0, 1, 2, or 3, and the size of each
+dimension is no longer limited to 94 or 96.
+
+Generic characters no longer exist.
+
+A dynamic charset priority list is used to infer the charset of
+unicodes for display &c.
+
+** The following facilities are obsolete:
+
+Minor modes: unify-8859-on-encoding-mode, unify-8859-on-decoding-mode
+
+\f
+* Lisp changes in Emacs 22.1
+
+map-char-table's behaviour has changed.
+
+New functions: characterp, max-char, map-charset-chars,
+define-charset-alias, primary-charset, set-primary-charset,
+unify-charset, clear-charset-maps, charset-priority-list,
+set-charset-priority, define-coding-system,
+define-coding-system-alias, coding-system-aliases, langinfo,
+string-to-multibyte.
+
+Changed functions: copy-sequence, decode-char, encode-char,
+set-fontset-font, new-fontset, modify-syntax-entry, define-charset,
+modify-category-entry
+
+Obsoleted: char-bytes, chars-in-region, set-coding-priority,
+char-valid-p
+
+\f
+* Incompatible Lisp changes
+
+Deleted functions: make-coding-system, register-char-codings,
+coding-system-spec
+
+** The character codes for characters from the
+eight-bit-control/eight-bit-graphic charsets aren't now in the range
+128-255.
\f
* Installation Changes in Emacs 21.4
+** Emacs includes now support for loading image libraries on demand.
+(Currently this feature is only used on MS Windows.) You can configure
+the supported image types and their associated dynamic libraries by
+setting the variable `image-library-alist'.
+
---
** A Bulgarian translation of the Emacs Tutorial is available.
---
** A French translation of the Emacs Tutorial is available.
+** Building with -DENABLE_CHECKING does not automatically build with union
+types any more. Add -DUSE_LISP_UNION_TYPE if you want union types.
\f
* Changes in Emacs 21.4
+** Passing resources on the command line now works on MS Windows.
+You can use --xrm to pass resource settings to Emacs, overriding any
+existing values. For example:
+
+ emacs --xrm "Emacs.Background:red" --xrm "Emacs.Geometry:100x20"
+
+will start up Emacs on an initial frame of 100x20 with red background,
+irrespective of geometry or background setting on the Windows registry.
+
+** New features in evaluation commands
+
++++
+*** The function `eval-defun' (C-M-x) called on defface reinitializes
+the face to the value specified in the defface expression.
+
+*** Typing C-x C-e twice prints the value of the integer result
+in additional formats (octal, hexadecimal, character) specified
+by the new function `eval-expression-print-format'. The same
+function also defines the result format for `eval-expression' (M-:),
+`eval-print-last-sexp' (C-j) and some edebug evaluation functions.
+
+** New input method chinese-sisheng for inputting Chinese Pinyin
+characters.
+
+** New command quail-show-key shows what key (or key sequence) to type
+in the current input method to input a character at point.
+
+** Convenient commands to switch buffers in a cyclic order are C-x <left>
+(prev-buffer) and C-x <right> (next-buffer).
+
+** Commands winner-redo and winner-undo, from winner.el, are now bound to
+C-c <left> and C-c <right>, respectively. This is an incompatible change.
+
+** Help commands `describe-function' and `describe-key' now show function
+arguments in lowercase italics on displays that support it. To change the
+default, customize face `help-argument-name' or redefine the function
+`help-default-arg-highlight'.
+
+---
+** The comint prompt can now be made read-only, using the new user
+option `comint-prompt-read-only'. This is not enabled by default,
+except in IELM buffers. The read-only status of IELM prompts can be
+controlled with the new user option `ielm-prompt-read-only', which
+overrides `comint-prompt-read-only'.
+
+The new commands `comint-kill-whole-line' and `comint-kill-region'
+support editing comint buffers with read-only prompts.
+
+`comint-kill-whole-line' is like `kill-whole-line', but ignores both
+read-only and field properties. Hence, it will always kill entire
+lines, including any prompts.
+
+`comint-kill-region' is like `kill-region', except that it ignores
+read-only properties, if it is safe to do so. This means that if any
+part of a prompt is deleted, then the entire prompt must be deleted
+and that all prompts must stay at the beginning of a line. If this is
+not the case, then `comint-kill-region' behaves just like
+`kill-region' if read-only are involved: it copies the text to the
+kill-ring, but does not delete it.
+
+** You can now use next-error (C-x `) and previous-error to advance to
+the next/previous matching line found by M-x occur.
+
+** Telnet will now prompt you for a port number with C-u M-x telnet.
+
++++
+** New command line option -Q.
+
+This is like using -q --no-site-file, but in addition it also disables
+the menu-bar, the tool-bar, the scroll-bars, tool tips, the blinking
+cursor, and the fancy startup screen.
+
+** C-h v and C-h f commands now include a hyperlink to the C source for
+variables and functions defined in C (if the C source is available).
+
+** When used interactively, `format-write-file' now asks for confirmation
+before overwriting an existing file, unless a prefix argument is
+supplied. This behavior is analogous to `write-file'.
+
+** You can now use Auto Revert mode to `tail' a file.
+If point is at the end of a file buffer before reverting, Auto Revert
+mode keeps it at the end after reverting. Similarly if point is
+displayed at the end of a file buffer in any window, it will stay at
+the end of the buffer in that window. This allows to tail a file:
+just put point at the end of the buffer and it will stay there. This
+rule applies to file buffers. For non-file buffers, the behavior may
+be mode dependent.
+
+** Auto Revert mode is now more careful to avoid excessive reverts and
+other potential problems when deciding which non-file buffers to
+revert. This matters especially if Global Auto Revert mode is enabled
+and `global-auto-revert-non-file-buffers' is non-nil. Auto Revert
+mode will only revert a non-file buffer if the buffer has a non-nil
+`revert-buffer-function' and a non-nil `buffer-stale-function', which
+decides whether the buffer should be reverted. Currently, this means
+that auto reverting works for Dired buffers (although this may not
+work properly on all operating systems) and for the Buffer Menu.
+
+** If the new user option `auto-revert-check-vc-info' is non-nil, Auto
+Revert mode reliably updates version control info (such as the version
+control number in the mode line), in all version controlled buffers in
+which it is active. If the option is nil, the default, then this info
+only gets updated whenever the buffer gets reverted.
+
+** New command `Buffer-menu-toggle-files-only' toggles display of file
+buffers only in the Buffer Menu. It is bound to `T' in Buffer Menu
+mode.
+
+** M-x compile has become more robust and reliable
+
+Quite a few more kinds of messages are recognized. Messages that are
+recognized as warnings or informational come in orange or green, instead of
+red. Informational messages are by default skipped with `next-error'
+(controlled by `compilation-skip-threshold').
+
+Location data is collected on the fly as the *compilation* buffer changes.
+This means you could modify messages to make them point to different files.
+This also means you can not go to locations of messages you may have deleted.
+
+The variable `compilation-error-regexp-alist' has now become customizable. If
+you had added your own regexps to this, you'll probably need to include a
+leading `^', otherwise they'll match anywhere on a line. There is now also a
+`compilation-mode-font-lock-keywords' and it nicely handles all the checks
+that configure outputs and -o options so you see at a glance where you are.
+
+The new file etc/compilation.txt gives examples of each type of message.
+
+** M-x grep has been adapted to new compile
+
+Hits are fontified in green, and hits in binary files in orange. Grep buffers
+can be saved and will again be loaded with the new `grep-mode'.
+
+** M-x diff uses diff-mode instead of compilation-mode.
+
+** M-x compare-windows now can automatically skip non-matching text to
+resync points in both windows.
+
+** New command `strokes-global-set-stroke-string'.
+This is like `strokes-global-set-stroke', but it allows you to bind
+the stroke directly to a string to insert. This is convenient for
+using strokes as an input method.
+
++++
+** Desktop package
+
+*** Desktop saving is now a minor mode, desktop-save-mode. Variable
+desktop-enable is obsolete. Customize desktop-save-mode to enable desktop
+saving.
+
+*** Buffers are saved in the desktop file in the same order as that in the
+buffer list.
+
+*** New commands:
+ - desktop-revert reverts to the last loaded desktop.
+ - desktop-change-dir kills current desktop and loads a new.
+ - desktop-save-in-desktop-dir saves desktop in the directory from which
+ it was loaded.
+
+*** New customizable variables:
+ - desktop-save. Determins whether the desktop should be saved when it is
+ killed.
+ - desktop-file-name-format.
+ - desktop-path. List of directories in which to lookup the desktop file.
+ - desktop-locals-to-save.
+ - desktop-globals-to-clear.
+ - desktop-clear-preserve-buffers-regexp.
+
+*** New command line option --no-desktop
+
+*** New hooks:
+ - desktop-after-read-hook run after a desktop is loaded.
+ - desktop-no-desktop-file-hook run when no desktop file is found.
+
+---
+** The saveplace.el package now filters out unreadable files.
+When you exit Emacs, the saved positions in visited files no longer
+include files that aren't readable, e.g. files that don't exist.
+Customize the new option `save-place-forget-unreadable-files' to nil
+to get the old behavior. The new options `save-place-save-skipped'
+and `save-place-skip-check-regexp' allow further fine-tuning of this
+feature.
+
+** You can have several Emacs servers on the same machine.
+
+ % emacs --eval '(setq server-name "foo")' -f server-start &
+ % emacs --eval '(setq server-name "bar")' -f server-start &
+ % emacsclient -s foo file1
+ % emacsclient -s bar file2
+
** On window systems, lines which are exactly as wide as the window
(not counting the final newline character) are no longer broken into
two lines on the display (with just the newline on the second line).
The new user option 'overflow-newline-into-fringe' may be set to nil to
revert to the old behaviour of continuing such lines.
-** The buffer boundaries (i.e. first and last line in the buffer) may now
-be marked with bitmaps in the fringes. In addition, up and down
-arrow bitmaps may be shown at the top and bottom of the right fringe
-if the window can be scrolled in either direction.
+** The buffer boundaries (i.e. first and last line in the buffer) may
+now be marked with angle bitmaps in the fringes. In addition, up and
+down arrow bitmaps may be shown at the top and bottom of the left or
+right fringe if the window can be scrolled in either direction.
This behavior is activated by setting the buffer-local variable
-`indicate-buffer-boundaries' to a non-nil value. If value is t, both
-boundaries and scrolling arrows are shown; any other non-nil value
-shows only the buffer boundaries. The default value of this variable
-is found in `default-indicate-buffer-boundaries'.
+`indicate-buffer-boundaries' to a non-nil value. The default value of
+this variable is found in `default-indicate-buffer-boundaries'.
+
+If value is `left' or `right', both angle and arrow bitmaps are
+displayed in the left or right fringe, resp. Any other non-nil value
+causes the bitmap on the top line to be displayed in the left fringe,
+and the bitmap on the bottom line in the right fringe.
+
+If value is a cons (ANGLES . ARROWS), the car specifies the position
+of the angle bitmaps, and the cdr specifies the position of the arrow
+bitmaps.
+
+For example, (t . right) places the top angle bitmap in left fringe,
+the bottom angle bitmap in right fringe, and both arrow bitmaps in
+right fringe. To show just the angle bitmaps in the left fringe, but
+no arrow bitmaps, use (left . nil).
** New command `display-local-help' displays any local help at point
in the echo area. It is bound to `C-h .'. It normally displays the
your .emacs will no longer establish the default highlighting -- Use
`sql-product' to accomplish this.
+ANSI keywords are always highlighted.
+
*** The function `sql-add-product-keywords' can be used to add
font-lock rules to the product specific rules. For example, to have
all identifiers ending in "_t" under MS SQLServer treated as a type,
you would use the following line in your .emacs file:
(sql-add-product-keywords 'ms
- '("\\<\\w+_t\\>" . font-lock-type-face))
+ '(("\\<\\w+_t\\>" . font-lock-type-face)))
*** Oracle support includes keyword highlighting for Oracle 9i. Most
SQL and PL/SQL keywords are implemented. SQL*Plus commands are
*** Microsoft SQLServer support has been significantly improved.
Keyword highlighting for SqlServer 2000 is implemented.
sql-interactive-mode defaults to use osql, rather than isql, because
-osql flushes it's error stream more frequently. Thus error messages
+osql flushes its error stream more frequently. Thus error messages
are displayed when they occur rather than when the session is
terminated.
called with the -E command line argument to use the operating system
credentials to authenticate the user.
+*** Postgres support is enhanced.
+Keyword highlighting of Postgres 7.3 is implemented. Prompting for
+the username and the pgsql `-U' option is added.
+
+*** MySQL support is enhanced.
+Keyword higlighting of MySql 4.0 is implemented.
+
*** Imenu support has been enhanced to locate tables, views, indexes,
packages, procedures, functions, triggers, sequences, rules, and
defaults.
** New command `kill-whole-line' kills an entire line at once.
By default, it is bound to C-S-<backspace>.
+** New commands to operate on pairs of open and close characters:
+`insert-pair', `delete-pair', `raise-sexp'.
+
+** A prefix argument of C-M-q in Emacs Lisp mode pretty-printifies the
+list starting after point.
+
+** Dired mode:
+
+*** New faces dired-header, dired-mark, dired-marked, dired-flagged,
+dired-ignored, dired-directory, dired-symlink, dired-warning
+introduced for Dired mode instead of font-lock faces.
+
+*** New Dired command `dired-compare-directories' marks files
+with different file attributes in two dired buffers.
+
++++
+*** New Dired command `dired-do-touch' (bound to T) changes timestamps
+of marked files with the value entered in the minibuffer.
+
++++
+*** In Dired's ! command (dired-do-shell-command), `*' and `?' now
+control substitution of the file names only when they are surrounded
+by whitespace. This means you can now use them as shell wildcards
+too. If you want to use just plain `*' as a wildcard, type `*""'; the
+doublequotes make no difference in the shell, but they prevent
+special treatment in `dired-do-shell-command'.
+
++++
+*** Dired's v command now runs external viewers to view certain
+types of files. The variable `dired-view-command-alist' controls
+what external viewers to use and when.
+
+*** In Dired, the w command now copies the current line's file name
+into the kill ring. With a zero prefix arg, copies absolute file names.
+
++++
+** Dired-x:
+
+*** Omitting files is now a minor mode, dired-omit-mode. The mode toggling
+command is bound to M-o. A new command dired-mark-omitted, bound to M-O,
+marks omitted files. The variable dired-omit-files-p is obsoleted, use the
+mode toggling function instead.
+
+** Info mode:
+
+*** A numeric prefix argument of `info' selects an Info buffer
+with the number appended to the *info* buffer name.
+
+*** New command `Info-history' (bound to L) displays a menu of visited nodes.
+
+*** New command `Info-toc' (bound to T) creates a node with table of contents
+from the tree structure of menus of the current Info file.
+
+*** New command `info-apropos' searches the indices of the known
+Info files on your system for a string, and builds a menu of the
+possible matches.
+
+*** New command `Info-copy-current-node-name' (bound to w) copies
+the current Info node name into the kill ring. With a zero prefix
+arg, puts the node name inside the `info' function call.
+
+*** New command `Info-search-case-sensitively' (bound to S).
+
+*** New command `Info-search-next' (unbound) repeats the last search
+without prompting for a new search string.
+
+*** New face `info-xref-visited' distinguishes visited nodes from unvisited
+and a new option `Info-fontify-visited-nodes' to control this.
+
+*** http and ftp links in Info are now operational: they look like cross
+references and following them calls `browse-url'.
+
+++
-** Info now hides node names in menus and cross references by default.
+*** Info now hides node names in menus and cross references by default.
If you prefer the old behavior, you can set the new user option
`Info-hide-note-references' to nil.
+*** Images in Info pages are supported.
+Info pages show embedded images, in Emacs frames with image support.
+Info documentation that includes images, processed with makeinfo
+version 4.7 or newer, compiles to Info pages with embedded images.
+
++++
+*** The default value for `Info-scroll-prefer-subnodes' is now nil.
+
+---
+*** Info-index offers completion.
+
** Support for the SQLite interpreter has been added to sql.el by calling
'sql-sqlite'.
** BibTeX mode:
+*** The new command bibtex-entry-update (bound to C-c C-u) updates
+an existing BibTeX entry.
*** New `bibtex-entry-format' option `required-fields', enabled by default.
*** bibtex-maintain-sorted-entries can take values `plain',
`crossref', and `entry-class' which control the sorting scheme used
** New functions frame-current-scroll-bars and window-current-scroll-bars.
These functions return the current locations of the vertical and
-horisontal scroll bars in a frame or window.
+horizontal scroll bars in a frame or window.
+
+---
+** Emacs now supports drag and drop for X. Dropping a file on a window
+ opens it, dropping text inserts the text. Dropping a file on a dired
+ buffer copies or moves the file to that directory.
** Under X, mouse-wheel-mode is turned on by default.
If the configure option `--without-xim' was used to turn off use of
XIM by default, the X resource useXIM can be used to turn it on.
-** `describe-char' can show data from the Unicode database file. See
-user option `unicode-data'.
-
** `undo-only' does an undo which does not redo any previous undo.
** `uniquify-strip-common-suffix' tells uniquify to prefer
latter is used by GNU locales.
** The utf-8/16 coding systems have been enhanced.
-By default, untranslatable utf-8 sequences (mostly representing CJK
-characters) are simply composed into single quasi-characters. User
-option `utf-translate-cjk' arranges to translate many utf-8 CJK
-character sequences into real Emacs characters in a similar way to the
-Mule-UCS system. This uses significant space, so is not the default.
+By default, untranslatable utf-8 sequences are simply composed into
+single quasi-characters. User option `utf-translate-cjk-mode' (it is
+turned on by default) arranges to translate many utf-8 CJK character
+sequences into real Emacs characters in a similar way to the Mule-UCS
+system. As this loads a fairly big data on demand, people who are not
+interested in CJK characters may want to customize it to nil.
You can augment/amend the CJK translation via hash tables
`ucs-mule-cjk-to-unicode' and `ucs-unicode-to-mule-cjk'. The utf-8
coding system now also encodes characters from most of Emacs's
be selected only when it is active). The default is nil, so that this
feature is not enabled.
+** On X, when the window manager requires that you click on a frame to
+select it (give it focus), the selected window and cursor position
+normally changes according to the mouse click position. If you set
+the variable x-mouse-click-focus-ignore-position to t, the selected
+window and cursor position do not change when you click on a frame
+to give it focus.
+
+++
** The new command `describe-char' (C-u C-x =) pops up a buffer with
description various information about a character, including its
-encodings and syntax, its text properties, overlays, and widgets at
-point. You can get more information about some of them, by clicking
-on mouse-sensitive areas or moving there and pressing RET.
+encodings and syntax, its text properties, how to input, overlays, and
+widgets at point. You can get more information about some of them, by
+clicking on mouse-sensitive areas or moving there and pressing RET.
+++
** The new command `multi-occur' is just like `occur', except it can
mouse, so that highlighting disappears when you press a key. You can
also disable mouse highlighting.
+** You can now customize if selecting a region by dragging the mouse
+shall not copy the selected text to the kill-ring by setting the new
+variable mouse-drag-copy-region to nil.
+
+++
** font-lock: in modes like C and Lisp where the fontification assumes that
an open-paren in column 0 is always outside of any string or comment,
in a directory or in a file. See the documentation of the user option
`display-time-mail-directory'.
-+++
-** The default value for `Info-scroll-prefer-subnodes' is now nil.
-
---
** LDAP support now defaults to ldapsearch from OpenLDAP version 2.
the extended number of colors, and defines the appropriate entries for
all of these colors.
++++
+*** Emacs now uses the full range of available colors for the default
+faces when running on a color terminal, including 16-, 88-, and
+256-color xterms. This means that when you run "emacs -nw" on an
+88-color or 256-color xterm, you will see essentially the same face
+colors as on X.
+
---
*** There's a new support for colors on `rxvt' terminal emulator.
whose width, height, or both width and height take up the entire
screen size. (For now, this does not work with some window managers.)
----
-** Info-index offers completion.
-
---
** Emacs now tries to set up buffer coding systems for HTML/XML files
automatically.
Minor Improvements
+*** The STARTTLS elisp wrapper (starttls.el) can now use GNUTLS
+instead of the OpenSSL based "starttls" tool. For backwards
+compatibility, it will prefer "starttls", but you can toggle
+`starttls-use-gnutls' to switch to GNUTLS (or simply remove the
+"starttls" tool).
+
*** Do not allow debugger output history variable to grow without bounds.
+++
to hide its text. This should be mostly transparent but slightly
changes the behavior of motion commands like C-e and C-p.
-+++
-** In Dired's ! command (dired-do-shell-command), `*' and `?' now
-control substitution of the file names only when they are surrounded
-by whitespace. This means you can now use them as shell wildcards
-too. If you want to use just plain `*' as a wildcard, type `*""'; the
-doublequotes make no difference in the shell, but they prevent
-special treatment in `dired-do-shell-command'.
-
-+++
-** Dired's v command now runs external viewers to view certain
-types of files. The variable `dired-view-command-alist' controls
-what external viewers to use and when.
-
+++
** Unquoted `$' in file names do not signal an error any more when
the corresponding environment variable does not exist.
is only rarely needed.
---
-** jit-lock can now be delayed with `jit-lock-defer-time'.
+** JIT-lock changes
+*** jit-lock can now be delayed with `jit-lock-defer-time'.
If this variable is non-nil, its value should be the amount of Emacs
idle time in seconds to wait before starting fontification. For
example, if you set `jit-lock-defer-time' to 0.25, fontification will
only happen after 0.25s of idle time.
+*** contextual refontification is now separate from stealth fontification.
+
+jit-lock-defer-contextually is renamed jit-lock-contextually and
+jit-lock-context-time determines the delay after which contextual
+refontification takes place.
+
+++
** Marking commands extend the region when invoked multiple times. If
you hit M-C-SPC (mark-sexp), M-@ (mark-word), M-h (mark-paragraph), or
if the arg is negative, it marks the current and the preceding
paragraphs.
-** In Dired, the w command now copies the current line's file name
-into the kill ring.
-
+++
** The variables dired-free-space-program and dired-free-space-args
have been renamed to directory-free-space-program and
+++
** Diary sexp entries can have custom marking in the calendar.
Diary sexp functions which only apply to certain days (such as
-`diary-block' or `diary-cyclic' now take an optional parameter MARK,
+`diary-block' or `diary-cyclic') now take an optional parameter MARK,
which is the name of a face or a single-character string indicating
how to highlight the day in the calendar display. Specifying a
single-character string as @var{mark} places the character next to the
`appt-display-format' controls how reminders are displayed, replacing
appt-issue-message, appt-visible, and appt-msg-window.
+** The new functions `diary-from-outlook', `diary-from-outlook-gnus',
+and `diary-from-outlook-rmail' can be used to import diary entries
+from Outlook-format appointments in mail messages. The variable
+`diary-outlook-formats' can be customized to recognize additional
+formats.
+
+
** VC Changes
*** The key C-x C-q no longer checks files in or out, it only changes
** F90 mode has new navigation commands `f90-end-of-block',
`f90-beginning-of-block', `f90-next-block', `f90-previous-block'.
+** F90 mode now has support for hs-minor-mode (hideshow).
+It cannot deal with every code format, but ought to handle a sizeable
+majority.
+
---
** Prolog mode has a new variable `prolog-font-lock-keywords'
to support use of font-lock.
to the text before point. If there is text in the buffer after point,
it remains unchanged.
+** Enhanced visual feedback in *Completions* buffer.
+
+Completions lists use faces to highlight what all completions
+have in common and where they begin to differ.
+
+The common prefix shared by all possible completions uses the face
+`completions-common-part', while the first character that isn't the
+same uses the face `completions-first-difference'. By default,
+`completions-common-part' inherits from `default', and
+`completions-first-difference' inherits from `bold'. The idea of
+`completions-common-part' is that you can use it to make the common
+parts less visible than normal, so that the rest of the differing
+parts is, by contrast, slightly highlighted.
+
+++
** New user option `inhibit-startup-buffer-menu'.
When loading many files, for instance with `emacs *', Emacs normally
to Windows, and can be found in both source and binary form at
http://gnuwin32.sourceforge.net/. Note that libpng also depends on
zlib, and tiff depends on the version of jpeg that it was compiled
-against.
+against. For additional information, see nt/INSTALL.
---
** Sound is now supported on MS Windows.
D: shows the diff of the revision at line with its previous revision
L: shows the log of the revision at line
W: annotates the workfile (most up to date) version
+
++++
+** In pcl-cvs mode, there is a new `d y' command to view the diffs
+between the local version of the file and yesterday's head revision
+in the repository.
+
\f
-* New modes and packages in 21.4
+* New modes and packages in Emacs 21.4
+
+** The new package flymake.el does on-the-fly syntax checking of program
+source files. See the Flymake's Info manual for more details.
+
+** The library tree-widget.el provides a new widget to display a set
+of hierarchical data as an outline. For example, the tree-widget is
+well suited to display a hierarchy of directories and files.
+
+** The wdired.el package allows you to use normal editing commands on dired
+buffers to change filenames, permissions, etc...
+
+** The new python.el package is used to edit Python and Jython programs.
+
+** The URL package (which had been part of W3) is now part of Emacs.
+++
** The new global minor mode `size-indication-mode' (off by default)
are left unspecified and can be bound individually through the global
or local keymaps.
++++
** The new kmacro package provides a simpler user interface to
emacs' keyboard macro facilities.
\f
* Lisp Changes in Emacs 21.4
+** If a command sets transient-mark-mode to `only', that
+enables Transient Mark mode for the following command, only.
+
++++
+** Cleaner way to enter key sequences.
+
+You can enter a constant key sequence in a more natural format, the
+same one used for saving keyboard macros, using the macro `kbd'. For
+example,
+
+(kbd "C-x C-f") => "\^x\^f"
+
+** The sentinel is now called when a network process is deleted with
+delete-process. The status message passed to the sentinel for a
+deleted network process is "deleted". The message passed to the
+sentinel when the connection is closed by the remote peer has been
+changed to "connection broken by remote peer".
+
+** If the buffer's undo list for the current command gets longer than
+undo-outer-limit, garbage collection empties it. This is to prevent
+it from using up the available memory and choking Emacs.
+
+---
+** New function quail-find-key returns a list of keys to type in the
+current input method to input a character.
+
++++
+** New functions posn-at-point and posn-at-x-y return
+click-event-style position information for a given visible buffer
+position or for a given window pixel coordinate.
+
+** skip-chars-forward and skip-chars-backward now handle
+character classes such as [:alpha:], along with individual characters
+and ranges.
+
+** Function pos-visible-in-window-p now returns the pixel coordinates
+and partial visiblity state of the corresponding row, if the PARTIALLY
+arg is non-nil.
+
+** The function `eql' is now available without requiring the CL package.
+
++++
+** The new primitive `set-file-times' sets a file's access and
+modification times. Magic file name handlers can handle this
+operation.
+
+** The display space :width and :align-to text properties are now
+supported on text terminals.
+
+** Support for displaying image slices
+
+*** New display property (slice X Y WIDTH HEIGHT) may be used with
+an image property to display only a specific slice of the image.
+
+*** Function insert-image has new optional fourth arg to
+specify image slice (X Y WIDTH HEIGHT).
+
+*** New function insert-sliced-image inserts a given image as a
+specified number of evenly sized slices (rows x columns).
+
+** New line-height and line-spacing properties for newline characters
+
+A newline may now have line-height and line-spacing text or overlay
+properties that control the height of the corresponding display row.
+
+If the line-height property value is 0, the newline does not
+contribute to the height of the display row; instead the height of the
+newline glyph is reduced. Also, a line-spacing property on this
+newline is ignored. This can be used to tile small images or image
+slices without adding blank areas between the images.
+
+If the line-height property value is a positive integer, the value
+specifies the minimum line height in pixels. If necessary, the line
+height it increased by increasing the line's ascent.
+
+If the line-height property value is a float, the minimum line height
+is calculated by multiplying the default frame line height by the
+given value.
+
+If the line-height property value is a cons (RATIO . FACE), the
+minimum line height is calculated as RATIO * height of named FACE.
+RATIO is int or float. If FACE is t, it specifies the current face.
+
+If the line-spacing property value is an positive integer, the value
+is used as additional pixels to insert after the display line; this
+overrides the default frame line-spacing and any buffer local value of
+the line-spacing variable.
+
+If the line-spacing property may be a float or cons, the line spacing
+is calculated as specified above for the line-height property.
+
+If the line-spacing value is a cons (total . SPACING) where SPACING is
+any of the forms described above, the value of SPACING is used as the
+total height of the line, i.e. a varying number of pixels are inserted
+after each line to make each line exactly that many pixels high.
+
+
+** The buffer local line-spacing variable may now have a float value,
+which is used as a height relative to the default frame line height.
+
+** Enhancements to stretch display properties
+
+The display property stretch specification form `(space PROPS)', where
+PROPS is a property list now allows pixel based width and height
+specifications, as well as enhanced horizontal text alignment.
+
+The value of these properties can now be a (primitive) expression
+which is evaluated during redisplay. The following expressions
+are supported:
+
+EXPR ::= NUM | (NUM) | UNIT | ELEM | POS | IMAGE | FORM
+NUM ::= INTEGER | FLOAT | SYMBOL
+UNIT ::= in | mm | cm | width | height
+ELEM ::= left-fringe | right-fringe | left-margin | right-margin
+ | scroll-bar | text
+POS ::= left | center | right
+FORM ::= (NUM . EXPR) | (OP EXPR ...)
+OP ::= + | -
+
+The form `NUM' specifies a fractional width or height of the default
+frame font size. The form `(NUM)' specifies an absolute number of
+pixels. If a symbol is specified, its buffer-local variable binding
+is used. The `in', `mm', and `cm' units specifies the number of
+pixels per inch, milli-meter, and centi-meter, resp. The `width' and
+`height' units correspond to the width and height of the current face
+font. An image specification corresponds to the width or height of
+the image.
+
+The `left-fringe', `right-fringe', `left-margin', `right-margin',
+`scroll-bar', and `text' elements specify to the width of the
+corresponding area of the window.
+
+The `left', `center', and `right' positions can be used with :align-to
+to specify a position relative to the left edge, center, or right edge
+of the text area. One of the above window elements (except `text')
+can also be used with :align-to to specify that the position is
+relative to the left edge of the given area. Once the base offset for
+a relative position has been set (by the first occurrence of one of
+these symbols), further occurences of these symbols are interpreted as
+the width of the area.
+
+For example, to align to the center of the left-margin, use
+ :align-to (+ left-margin (0.5 . left-margin))
+
+If no specific base offset is set for alignment, it is always relative
+to the left edge of the text area. For example, :align-to 0 in a
+header-line aligns with the first text column in the text area.
+
+The value of the form `(NUM . EXPR)' is the value of NUM multiplied by
+the value of the expression EXPR. For example, (2 . in) specifies a
+width of 2 inches, while (0.5 . IMAGE) specifies half the width (or
+height) of the specified image.
+
+The form `(+ EXPR ...)' adds up the value of the expressions.
+The form `(- EXPR ...)' negates or subtracts the value of the expressions.
+
+** New macro with-local-quit temporarily sets inhibit-quit to nil for use
+around potentially blocking or long-running code in timers
+and post-command-hooks.
+
++++
+** New face attribute `min-colors' can be used to tailor the face color
+to the number of colors supported by a display, and define the
+foreground and background colors accordingly so that they look best on
+a terminal that supports at least this many colors. This is now the
+preferred method for defining default faces in a way that makes a good
+use of the capabilities of the display.
+
+** New function 'define-fringe-bitmap' can now be used to change the
+built-in fringe bitmaps, as well as create new fringe bitmaps.
+The return value is a number identifying the new fringe bitmap.
+
+To change a built-in bitmap, do (require 'fringe) and identify the
+bitmap to change with the value of the corresponding symbol, like
+`left-truncation-fringe-bitmap' or `continued-line-fringe-bitmap'.
+
+** New function 'destroy-fringe-bitmap' may be used to destroy a
+previously created bitmap, or restore a built-in bitmap.
+
+** New function 'set-fringe-bitmap-face' can now be used to set a
+specific face to be used for a specific fringe bitmap. Normally,
+this should be a face derived from the `fringe' face, specifying
+the foreground color as the desired color of the bitmap.
+
+** There are new display properties, left-fringe and right-fringe,
+that can be used to show a specific bitmap in the left or right fringe
+bitmap of the display line.
+
+Format is 'display '(left-fringe BITMAP [FACE]), where BITMAP is a
+number identifying a fringe bitmap, either built-in or as returned by
+`define-fringe-bitmap', and FACE is an optional face name to be used
+for displaying the bitmap.
+
+** New function `fringe-bitmaps-at-pos' returns a cons (LEFT . RIGHT)
+identifying the current fringe bitmaps in the display line at a given
+buffer position. A nil value means no bitmap.
+
+** Multiple overlay arrows can now be defined and managed via the new
+variable `overlay-arrow-variable-list'. It contains a list of
+varibles which contain overlay arrow position markers, including
+the original `overlay-arrow-position' variable.
+
+Each variable on this list may have individual `overlay-arrow-string'
+and `overlay-arrow-bitmap' properties that specify an overlay arrow
+string (for non-window terminals) or fringe bitmap (for window
+systems) to display at the corresponding overlay arrow position.
+If either property is not set, the default `overlay-arrow-string' or
+'overlay-arrow-fringe-bitmap' will be used.
+
++++
+** New function `line-number-at-pos' returns line number of current
+line in current buffer, or if optional buffer position is given, line
+number of corresponding line in current buffer.
+
+** The default value of `sentence-end' is now defined using the new
+variable `sentence-end-without-space' which contains such characters
+that end a sentence without following spaces.
+
+** The function `sentence-end' should be used to obtain the value of
+the variable `sentence-end'. If the variable `sentence-end' is nil,
+then this function returns the regexp constructed from the variables
+`sentence-end-without-period', `sentence-end-double-space' and
+`sentence-end-without-space'.
+
++++
+** The flags, width, and precision options for %-specifications in function
+`format' are now documented. Some flags that were accepted but not
+implemented (such as "*") are no longer accepted.
+
+** New function `macroexpand-all' expands all macros in a form.
+It is similar to the Common-Lisp function of the same name.
+One difference is that it guarantees to return the original argument
+if no expansion is done, which may be tested using `eq'.
+
+++
** New function `delete-dups' destructively removes `equal' duplicates
from a list. Of several `equal' occurrences of an element in the list,
-the last one is kept.
+the first one is kept.
+++
** `declare' is now a macro. This change was made mostly for
tasks, for example; it can be used by the copyright package to make
sure saved files have the current year in any copyright headers.
++++
** The function `insert-for-yank' now supports strings where the
`yank-handler' property does not span the first character of the
string. The old behavior is available if you call
** The new function `merge-coding-systems' fills in unspecified aspects
of one coding system from another coding system.
----
++++
** The variable `safe-local-eval-forms' specifies a list of forms that
are ok to evaluate when they appear in an `eval' local variables
specification. Normally Emacs asks for confirmation before evaluating
specification language, which can be used to do this test for faces
defined with defface.
+** The function face-differs-from-default-p now truly checks whether the
+given face displays differently from the default face or not (previously
+it did only a very cursory check).
+
+++
** face-attribute, face-foreground, face-background, and face-stipple now
accept a new optional argument, INHERIT, which controls how face
** New functions face-attribute-relative-p and merge-face-attribute
help with handling relative face attributes.
+** The priority of faces in an :inherit attribute face-list is reversed.
+If a face contains an :inherit attribute with a list of faces, earlier
+faces in the list override later faces in the list; in previous releases
+of Emacs, the order was the opposite. This change was made so that
+:inherit face-lists operate identically to face-lists in text `face'
+properties.
+
+++
** Enhancements to process support
** New function x-send-client-message sends a client message when
running under X.
+** Arguments for remove-overlays are now optional, so that you can remove
+all overlays in the buffer by just calling (remove-overlay).
+
** New packages:
*** The new package gdb-ui.el provides an enhanced graphical interface to
with Custom.
** UTF-16 coding systems are available, encoding the same characters
-as mule-utf-8. Coding system `utf-16-le-dos' is useful as the value
-of `selection-coding-system' in MS Windows, allowing you to paste
-multilingual text from the clipboard. Set it interactively with
-C-x RET x or in .emacs with `(set-selection-coding-system 'utf-16-le-dos)'.
+as mule-utf-8.
** There is a new language environment for UTF-8 (set up automatically
in UTF-8 locales).
HCoop / bpt / emacs.git / blobdiff