From: Glenn Morris Date: Thu, 11 Mar 2010 06:10:50 +0000 (-0800) Subject: Rotate NEWS to NEWS.23, create new NEWS for Emacs 24. X-Git-Tag: emacs-pretest-24.0.90~104^2~275^2~438^2~763 X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=eb19914500ede78ff56c2b782c98a7db2661d90f;p=emacs.git Rotate NEWS to NEWS.23, create new NEWS for Emacs 24. --- diff --git a/etc/NEWS b/etc/NEWS index 00c4765f822..d1e3eb0c708 100644 --- a/etc/NEWS +++ b/etc/NEWS @@ -1,15 +1,15 @@ GNU Emacs NEWS -- history of user-visible changes. -Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc. +Copyright (C) 2010 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 23. +This file is about changes in Emacs version 24. -See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17 -for changes in older Emacs versions. +See files 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' with a prefix argument or by typing C-u C-h C-n. @@ -22,2376 +22,31 @@ When you add a new item, please add it without either +++ or --- so we will look at it and add it to the manual. -* Installation Changes in Emacs 23.2 - -** New configure options for Emacs developers -These are not new features; only the configure flags are new. ---- -*** --enable-profiling builds Emacs with profiling enabled. -This might not work on all platforms. ---- -*** --enable-checking[=OPTIONS] builds emacs with extra runtime checks. - ---- -** `make install' now consistently ignores umask, creating a -world-readable install. - -** Emacs compiles with Gconf support, if it is detected. -Use the configure option --without-gconf to disable this. - -* Startup Changes in Emacs 23.2 -+++ -** The command-line option -Q (--quick) also inhibits loading X resources. -However, if Emacs is compiled with the Lucid or Motif toolkit, X -resource settings for the graphical widgets are still applied. -On Windows, the -Q option causes Emacs to ignore Registry settings, -but environment variables set on the Registry are still honored. -+++ -*** The new variable `inhibit-x-resources' shows whether X resources -were loaded. - -+++ -** New command-line option -mm (--maximized) maximizes the initial frame. - -* Changes in Emacs 23.2 - -+++ -** The maximum size of buffers (and the largest fixnum) is doubled. -On typical 32bit systems, buffers can now be up to 512MB. - ---- -** The default value of `trash-directory' is now nil. -This means that `move-file-to-trash' trashes files according to -freedesktop.org specifications, the same method used by the Gnome, -KDE, and XFCE desktops. (This change has no effect on Windows, which -uses `system-move-file-to-trash' for trashing.) - -+++ -** The pointer now becomes invisible when typing. -Customize `make-pointer-invisible' to disable this feature. - -** Font changes - -*** Emacs can use the system default monospaced font in Gnome. -To enable this feature, set `font-use-system-font' to non-nil (it is -nil by default). If the system default changes, Emacs changes also. -This feature requires Gconf support, which is automatically included -at compile-time if configure detects the gconf libraries (you can -disable this with the configure option --without-gconf). - -*** On X11, Emacs reacts to Xft changes made by configuration tools, -via the XSETTINGS mechanism. This includes antialias, hinting, -hintstyle, RGBA, DPI and lcdfilter changes. - -+++ -** Killing a buffer with a running process now asks for confirmation. -To remove this query, remove `process-kill-buffer-query-function' from -`kill-buffer-query-functions', or set the appropriate process flag -with `set-process-query-on-exit-flag'. - -** File-local variable changes -+++ -*** Specifying a minor mode as a local variables enables that mode, -unconditionally. The previous behavior, toggling the mode, was -neither reliable nor generally desirable. - -*** New commands for adding and removing file-local variables: -`add-file-local-variable', `delete-file-local-variable', -`add-file-local-variable-prop-line', and -`delete-file-local-variable-prop-line'. - -*** New commands for adding and removing directory-local variables, -and copying them to and from file-local variable lists: -`add-dir-local-variable', `delete-dir-local-variable', -`copy-dir-locals-to-file-locals', -`copy-dir-locals-to-file-locals-prop-line' and -`copy-file-locals-to-dir-locals'. - -** Internationalization changes -+++ -*** Unibyte sessions are now considered obsolete. -This refers to the EMACS_UNIBYTE environment variable as well as the ---unibyte, --multibyte, --no-multibyte, and --no-unibyte command line -arguments. Customizing enable-multibyte-characters and setting -default-enable-multibyte-characters are also deprecated. ---- -*** New coding system `utf-8-hfs'. -This is suitable for default-file-name-coding-system on Mac OS X; see -international/ucs-normalize.el. - ---- -** Function arguments in *Help* buffers are now shown in upper-case. -Customize `help-downcase-arguments' to t to show them in lower-case. - - -* Editing Changes in Emacs 23.2 - -** Kill-ring and selection changes -+++ -*** If `select-active-regions' is t, any active region automatically -becomes the primary selection (for interaction with other window -applications). If you enable this, you might want to bind -`mouse-yank-primary' to Mouse-2. -+++ -*** When `save-interprogram-paste-before-kill' is non-nil, the kill -commands save the interprogram-paste selection into the kill ring -before doing anything else. This avoids losing the selection. -+++ -*** When `kill-do-not-save-duplicates' is non-nil, identical -subsequent kills are not duplicated in the `kill-ring'. - -** Completion changes - -*** The new command `completion-at-point' provides mode-sensitive completion. - -*** tab-always-indent set to `complete' lets TAB do completion as well. -+++ -*** The new completion-style `initials' is available. -For instance, this can complete M-x lch to list-command-history. - -*** The new variable `completions-format' determines how completions -are displayed in the *Completions* buffer. If you set it to -`vertical', completions are sorted vertically in columns. - -+++ -** The default value of `blink-matching-paren-distance' is increased. - ---- -** M-n provides more default values in the minibuffer for commands -that read file names. These include the file name at point (when ffap -is loaded without ffap-bindings), the file name on the current line -(in Dired buffers), and the directory names of adjacent Dired windows -(for Dired commands that operate on several directories, such as copy, -rename, or diff). - -+++ -** M-r is bound to the new `move-to-window-line-top-bottom'. -This moves point to the window center, top and bottom on successive -invocations, in the same spirit as the C-l (recenter-top-bottom) -command. - -+++ -** The new variable `recenter-positions' determines the default -cycling order of C-l (`recenter-top-bottom'). - -+++ -** The abbrevs file is now a file named abbrev_defs in -user-emacs-directory; but the old location, ~/.abbrev_defs, is used if -that file exists. - -* Changes in Specialized Modes and Packages in Emacs 23.2 - -** The bookmark menu has a narrowing search via bookmark-bmenu-search. - -** LaTeX mode now provides completion (via completion-at-point). - -** sym-comp.el is now declared obsolete, superceded by completion-at-point. - -** lucid.el and levents.el are now declared obsolete. - -** pcomplete provides a new command `pcomplete-std-completion' which -is similar to `pcomplete' but using the standard completion UI code. - -** Calc -+++ -*** The Calc settings file is now a file named calc.el in -user-emacs-directory; but the old location, ~/.calc.el, is used if -that file exists. - ---- -*** Graphing commands (`g f' etc.) now work on MS-Windows, if you have -the native Windows port of Gnuplot version 3.8 or later installed. - -** Calendar and diary - -+++ -*** Fancy diary display is now the default. -If you prefer the simple display, customize `diary-display-function'. - -+++ -*** The diary's fancy display now enables view-mode. - ---- -*** The command `calendar-current-date' accepts an optional argument -giving an offset from today. - -** Desktop ---- -*** The default value for `desktop-buffers-not-to-save' is nil. -This means Desktop will try restoring all buffers, when you restart -your Emacs session. Also, `desktop-buffers-not-to-save' is only -effective for buffers that have no associated file. If you want to -exempt buffers that do correspond to files, customize the value of -`desktop-files-not-to-save' instead. - -** Dired - -*** The new variable `dired-auto-revert-buffer' allows to revert -dired buffers automatically on revisiting. - -** DocView - -*** When `doc-view-continuous' is non-nil, scrolling a line -on the page edge advances to the next/previous page. - -** GDB-UI - -*** Toolbar functionality for reverse debugging. Display of STL -collections as watch expressions. These features require GDB 7.0 -or later. - -** Grep -+++ -*** A new command `zrgrep' searches recursively in gzipped files. - -** Info - -*** The new command `Info-virtual-index' bound to "I" displays a menu of -matched topics found in the index. - -*** The new command `info-finder' replaces finder.el with a virtual Info -manual that generates an Info file which gives the same information -through a menu structure. - -** Message mode is now the default mode for composing mail. - -The default for `mail-user-agent' is now message-user-agent, so the -C-x m (`compose-mail') command uses Message mode instead of Mail mode. - -Message mode has been included in Emacs, as part of the Gnus package, -for several years. It provides several features that are absent in -Mail mode, such as MIME handling. - -*** If the user has not customized mail-user-agent, `compose-mail' -checks for Mail mode customizations, and issues a warning if these -customizations are found. This alerts users who may otherwise be -unaware that their mail configuration has changed. - -To disable this check, set compose-mail-user-agent-warnings to nil. - -** The default value of mail-interactive is t, since Emacs 23.1. -(This was not announced at the time.) It means that when sending mail, -Emacs will wait for the process sending mail to return. If you -experience delays when sending mail, you may wish to set this to nil. - -** nXML mode is now the default for editing XML files. - -** Shell -+++ -*** ansi-color is now enabled by default. -To disable it, set ansi-color-for-comint-mode to nil. - -+++ -** Tramp - -*** New connection methods "rsyncc", "imap" and "imaps". -On systems which support GVFS-Fuse, Tramp offers also the new -connection methods "dav", "davs", "obex" and "synce". - -** VC and related modes - -*** When using C-x v v or C-x v i on a unregistered file that is in a -directory not controlled by any VCS, ask the user what VC backend to -use to create a repository, create a new repository and register the -file. - -*** FIXME: add info about the new VC functions: vc-root-diff and -vc-root-print-log once they stabilize. - -*** The log functions (C-x v l and C-x v L) do not show the full log -by default anymore. The number of entries shown can be chosen -interactively with a prefix argument, by customizing -vc-log-show-limit. The log buffer display buttons that can be used -to change the number of entries shown. -RCS, SCCS, CVS do not support this feature. - -*** vc-annotate supports annotations through file copies and renames, -it displays the old names for the files and it can show logs/diffs for -the corresponding lines. Currently only Git and Mercurial take -advantage of this feature. - -*** The log command in vc-annotate can display a single log entry -instead of redisplaying the full log. The RCS, CVS and SCCS VC -backends do not support this. - -*** When a file is not found, VC will not try to check it out of RCS anymore. - -*** Diff and log operations can be used from dired buffers. - -*** vc-git changes - -**** The short log format for git makes use of the graph display, so -it's not supported on git versions earlier than 1.5. - -**** Support for operating with stashes has been added to vc-dir: the stash list is -displayed in the *vc-dir* header, stashes can be created, removed, applied and -their content displayed. - -**** vc-dir displays the stash status - -**** vc-dir requires at least git-1.5.5. - -*** vc-bzr supports operating with shelves: the shelve list is -displayed in the *vc-dir* header, shelves can be created, removed and applied. - -*** log-edit-strip-single-file-name controls whether or not single filenames -are stripped when copying text from the ChangeLog to the *VC-Log* buffer. - -** Elint - ---- -*** Elint now uses compilation-mode. - ---- -*** Elint can now scan individual files and whole directories, -and can be run in batch mode. - ---- -*** Elint does a more thorough initialization, and recognizes more built-in -functions and variables. Customize `elint-scan-preloaded' if you want -to sacrifice some accuracy for a faster startup. - ---- -*** Elint attempts some basic understanding of featurep and (f)boundp tests. - ---- -*** Customize `elint-ignored-warnings' to suppress some warnings. - -** Miscellaneous -+++ -*** The new command `async-shell-command' bound globally to `M-&' executes -the command asynchronously without the need to manually add ampersand to -the end of the command. Its output appears in the buffer `*Async Shell -Command*'. - -*** Isearch searches in the comint/shell input history when the new variable -`comint-history-isearch' is non-nil. New commands `comint-history-isearch-backward' -and `comint-history-isearch-backward-regexp' (bound to M-r) start Isearch -in the input history regardless of the value of `comint-history-isearch'. - -*** Interactively `multi-isearch-buffers' and `multi-isearch-buffers-regexp' -read buffer names to search, one by one, ended with RET. With a prefix -argument, they ask for a regexp, and search in buffers whose names match -the specified regexp. Interactively `multi-isearch-files' and -`multi-isearch-files-regexp' read file names to search, one by one, -ended with RET. With a prefix argument, they ask for a wildcard, and -search in file buffers whose file names match the specified wildcard. - -+++ -*** Autorevert Tail mode now works also for remote files. - -+++ -*** The new built-in commands `su' and `sudo' support Tramp. -That means, they change `default-directory' to the new users value, -and let commands run under that user permissions. It works even when -`default-directory' is already remote. Calling the external commands -is possible by `*su' or `*sudo', repectively. - ---- -*** When running in a new enough xterm (newer than version 242), emacs -asks xterm what the background color is and it sets up faces -accordingly for a dark background if needed (the current default is to -consider the background light). - - -* New Modes and Packages in Emacs 23.2 - -** CEDET (the Collection of Emacs Development Tools) is now in Emacs. -This is a collection of packages to aid with using Emacs as an IDE -(integrated development environment): - -*** The Semantic package allows the use of parsers to intelligently -edit and navigate source code. Parsers for C/C++, Java, Javascript, -and several other languages are included by default, and Semantic can -also interface with external tools such as GNU Global and GNU Idutils. - -To enable Semantic, use the global minor mode `semantic-mode'. -See the Semantic manual for details. - -*** EDE (Emacs Development Environment) is a package for managing code -projects, including features such as automatic Makefile generation. - -To enable EDE, use the minor mode `global-ede-mode'. -See the EDE manual for details. - -*** SRecode is a library for recoding Semantic tags back into source -code. It is currently used by some parts of Semantic and EDE; in the -future, it may be used for code generation features. - -*** The EIEIO library implements a subset of the Common Lisp Object -System (CLOS). It is used by the other CEDET packages. - -** mpc.el is a front end for the Music Player Daemon. Run it with M-x mpc. - -** htmlfontify.el turns a fontified Emacs buffer into an HTML page. - -** js.el is a new major mode for JavaScript files. - -** imap-hash.el is a new library to address IMAP mailboxes as hashtables. - - -* Incompatible Lisp Changes in Emacs 23.2 - -+++ -** The Lisp reader turns integers that are too large/small into floats. -For instance, on machines where `536870911' is the largest integer, -reading `536870912' gives the floating-point object `536870912.0'. - -This change only concerns the Lisp reader; it does not affect how -actual integer objects overflow. - ---- -** Several obsolete functions removed. -The functions have been obsolete since Emacs 19, and are unlikely to -be in use: - - time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy - time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd, - time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss, - time-stamp-hhmm, baud-rate - ---- -** Support for generating Emacs 18 compatible bytecode (by setting -the variable `byte-compile-compatibility') has been removed. - -** In image-mode.el `image-mode-maybe' is obsolete. Instead, you can -either use `image-mode' that displays an image file as the actual image -inititally, or `image-mode-as-text' when you want to display an image file -as text inititally. `image-mode-as-text' is a combination of a non-image -mode from `auto-mode-alist' (or Fundamental mode) and `image-minor-mode'. -`image-minor-mode' provides `C-c C-c' key binding to toggle image display. -`image-toggle-display-text' removes image properties. -`image-toggle-display-image' adds image properties. -`image-toggle-display' toggles between `image-mode-as-text' and -`image-mode'. - - -* Lisp changes in Emacs 23.2 - -** make-network-socket can now also create `seqpacket' Unix sockets. - -** New function `completion-in-region' to use the standard completion -facilities on a particular region of text. - -+++ -** The 4th arg to all-completions (aka hide-spaces) is declared obsolete. - ---- -** read-file-name-predicate is obsolete. It was used to pass the predicate -to read-file-name-internal because read-file-name-internal abused its `pred' -argument to pass the current directory, but this hack is not needed -any more. - -** Frame parameter changes - -+++ -*** You can give the `fullscreen' frame parameter the value `maximized'. -This maximizes the frame. - -+++ -*** The new frame parameter `sticky' makes Emacs frames sticky in -virtual desktops. - ---- -** completion-base-size is obsoleted by completion-base-position. -This change causes a few backward incompatibilities, mostly with -choose-completion-string-functions where the `mini-p' argument has -been replaced by a `base-position' argument, and where the `base-size' -argument is now always nil. - -** called-interactively-p now takes one argument and replaces interactive-p -which is now marked obsolete. -** New function set-advertised-calling-convention makes it possible -to obsolete arguments as well as make some arguments mandatory. -** eval-next-after-load is obsolete. -** New hook `after-load-functions' run after loading an Elisp file. - -** You can control which binding is preferentially shown in menus and -docstrings by adding a `:advertised-binding' property to the corresponding -command's symbol. That property can hold a single binding or a list -of bindings. - -** New macro with-silent-modifications to tweak text properties without -affecting the buffer's modification state. -** All the default-FOO variables that hold the default value of the FOO -variable, are now declared obsolete. - -** read-key is a function halfway between read-event and read-key-sequence. -It reads a single key, but obeys input and escape sequence decoding. - -** start-process-shell-command and start-file-process-shell-command -now only take a single `command' argument. - -** The variable `process-file-side-effects' shall be bound to nil, if -a `process-file' call does not change a remote file. By this, file -name handlers like Tramp can apply optimizations. - -+++ -** Hash tables have a new printed representation that is readable. -The feature `hashtable-print-readable' identifies this new -functionality. - -** New functions performing Unicode normalization are added: -ucs-normalize-NFD-region, ucs-normalize-NFD-string, -ucs-normalize-NFC-region, ucs-normalize-NFC-string, -ucs-normalize-NFKD-region, ucs-normalize-NFKD-string, -ucs-normalize-NFKC-region, ucs-normalize-NFKC-string, -ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string, -ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string. - -** completion-annotate-function specifies how to compute annotations -for completions displayed in *Completions*. - -+++ -** Face aliases can now be marked as obsolete, using the macro -`define-obsolete-face-alias'. - ---- -** Changing the file-names generated by byte-compilation by redefining -the function `byte-compile-dest-file' before loading bytecomp.el is obsolete. -Instead, customize byte-compile-dest-file-function. - ---- -** `byte-compile-warnings' has new members, `constants' and `suspicious'. - -** `delete-directory' has an optional parameter RECURSIVE. - -** New function `copy-directory', which copies a directory recursively. - -+++ -** New function `window-full-height-p', analogous to the full-width version. - - -* Changes in Emacs 23.2 on non-free operating systems - ---- -** On MS-Windows, `display-time' now displays the system load average -as well as the time, as it does on GNU and Unix. - - -* Installation Changes in Emacs 23.1 - -** The default X toolkit is now Gtk+, rather than Lucid. -The configure option `--with-gtk' has been removed. Gtk is now the -default toolkit, but you can use --with-x-toolkit=gtk if necessary. - -** New font code. -Fonts are handled by new code capable of dealing with multiple font -backends. This uses the freetype and fontconfig libraries. - -*** Emacs now accepts font names supplied in the fontconfig format -(e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12"). - -*** Added support for local fonts (fonts installed on the machine -where Emacs is running). - -*** Added support for the Xft library for antialiasing. - -*** Added support for the otf library for complex text layout by -OpenType fonts. - -*** Added support for the m17n library for text shaping. - -** Changes to image support - -*** configure now checks for libgif before libungif when searching for -a GIF library. - -*** Emacs now supports the SVG image format through librsvg2. - -*** Emacs now supports multi-page TIFF images. - -** New NeXTSTEP-based port. -This provides support for GNUstep (via the GNUstep libraries) and Mac -OS X (via the Cocoa libraries). - -Specify --with-ns to configure for this. By default, a self-contained -app will be built (containing all lisp). To install/share lisp with -other emacsen (e.g. X11 build) use --disable-ns-self-contained. See -nextstep/README and nextstep/INSTALL in the Emacs source directory. - -** Mac OS X is no longer supported via Carbon. -Use the NeXTSTEP port, described above. - -** The new configuration option "--with-dbus" enables D-Bus language -bindings for Emacs. - -** Support for many obsolete platforms has been removed. -See the list at the end of etc/MACHINES for details. - -*** Support for systems without alloca has been removed. - -*** Support for Sun windows has been removed. - -*** The `emacstool' utility has been removed. - -** The following platforms will be removed in a future Emacs version: -If you are still using Emacs on one of these platforms, please email -emacs-devel@gnu.org to inform the Emacs developers. - -*** Old GNU/Linux systems based on libc version 5. - -*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF -executable format. - -*** Solaris versions 2.6 and below. - -*** Solaris on IBM RS6000 machines. - -*** UNIX System V (the original SysV, not later platforms based on it). - -*** Unixware on non-x86 machines. - -*** Platforms not supporting shared libraries (i.e., requiring the -NO_SHARED_LIBS compilation flag). - -** The configure options `--with-gcc', `--without-gcc' have been removed. -Configure will use gcc by default. Set the CC environment variable if -you need control over which C compiler is used. - -** The refcards are now shipped as PDF files. - -** The manuals are now licensed under the GNU Free Documentation License v1.3, -or any later version. - -** Emacs 23 comes with a new set of default icons. -Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png. -The Emacs 22 icon is available as `emacs22.png' in the same location. - -* Changes in Emacs 23.1 - -** Improved X Window System support - -*** Emacs now supports using both X displays and ttys in one session. -With an Emacs server active (M-x server-start), `emacsclient -t' -creates a tty frame connected to the running emacs server. You can -use any number of different ttys. `emacsclient -c' creates a new X11 -frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set). -There may be problems if a display exits unexpectedly and Emacs is compiled -with Gtk+, see etc/PROBLEMS. - -You can test for the presence of this feature in your Lisp code by -testing for the `multi-tty' feature. - -*** Emacs starts in the background, as a daemon, when given the ---daemon command line argument. It disconnects from the terminal and -starts the server. Clients can connect and create graphical or -terminal frames using emacsclient. - -**** emacsclient starts emacs in daemon mode and connects to it when ---alternate-editor="" is used (or when the evironment variable -ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an -emacs server. - -*** The new command close-display-connection closes a connection to a -remote display. There are some bugs for Gtk+. See etc/PROBLEMS. - -*** Emacs now supports the XEmbed specification. -You can embed Emacs in another application on X11. The new command line -option --parent-id is used to pass the parent window id to Emacs. See -http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html -for details about XEmbed. - -*** Emacs can now set the frame opacity. -The opacity of a frame can be controlled by setting the `alpha' frame -parameter. This only takes effect on a compositing window manager for -the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac -OS X, or on Windows 2000 and later versions of Windows. - -The alpha parameter should be an integer between 0 (transparent) and -100 (opaque), or a float number between 0.0 and 1.0. It can also be a -cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an -active frame and INACTIVE is the opacity of non-active frames. - -The variable `frame-alpha-lower-limit' defines a lower bound for the -opacity; the default is 20. - -** Internationalization changes - -*** 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' (`emacs-internal' is an alias -for this). This encoding is backward-compatible with Unicode's UTF-8 -encoding. The internal encoding previously used by Emacs, -`emacs-mule', is still available for reading and writing files. - -During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files. -As a result, byte-compiled files containing non-ASCII characters can't -be read by earlier versions of Emacs. Files compiled by Emacs 20, 21, -or 22 are loaded correctly as `emacs-mule' (whether or not they -contain multibyte characters). This takes somewhat more time, so it -may be worth recompiling existing .elc files which don't need to be -shared with older Emacsen. - -*** There are new coding systems/aliases; see M-x list-coding-systems. - -*** There is a new charset implementation with many new charsets. -See M-x list-character-sets. New charsets can be defined conveniently -as tables of unicodes. - -*** There are new language environments for Chinese-GBK, -Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu, -Sinhala, and TaiViet. - -*** The minor modes unify-8859-on-encoding-mode and -unify-8859-on-decoding-mode are obsolete. - -*** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers -accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for -decimal). It also accepts Unicode character names with completion. - -*** The `cyrillic-translit' input method supports many new characters. -Common typographical characters available from Unicode were added to -`cyrillic-translit': punctuation marks, accented characters, fractions, -and others. - -** Emacs now supports serial port access on GNU/Linux, Unix, and -Windows. The new command `serial-term' starts an interactive terminal -on a serial port. The serial port can be configured at runtime with -the mode-line mouse menu. - -** Menu Bar changes - -*** In the Options menu, the "Set Default Font" item applies the -selected font to the `default' face on all frames, not just the -current frame. Furthermore, if Emacs is compiled with both GTK and -Fontconfig support, the "Set Default Font" item uses the GTK font -selection dialog instead of an Emacs pop-up menu. - -*** The font setting chosen by "Set Default Font" is saved if the -"Save Options" item is used. - -*** The Tools menu contains a new Encryption/Decryption submenu. -This contains commands provided by EasyPG, the newly-included -interface to GnuPG (see New Modes and Packages). - -*** In the Options menu, the "Truncate Long Lines in the Buffer" entry -has been replaced with a submenu offering three different ways to -handle long lines: truncation, continuation at the window edge, and -the new word wrapping behavior (see Editing Changes, below). - -*** Improvements to menus for major and minor modes -More major and minor modes now have a mode specific menu, and existing -mode menus have been improved to include more functionality. - -** Mode-line changes - -*** The mode-line displays a `@', instead of `-', if the -default-directory for the current buffer is on a remote machine. - -*** The mode-line displays a mode menu when mouse-1 is clicked on a -minor mode, in the same way as it already did for major modes. - -*** The `mode-line-emphasis' face is used to highlight certain -mode-line information (e.g. waiting for a VC command to finish). - -*** The mode-line tooltips have been improved to provide more details. - -*** The VC, line/colum number and minor mode indicators on the mode -line are now interactive: mouse-1 can be used on them to pop up a menu. - -** File deletion can make use of the Recycle Bin or system Trash folder. -Set `delete-by-moving-to-trash' non-nil to use this. Deleted files -and directories will then be sent to the Recycle Bin on Windows, and -to `trash-directory' on other systems. - -** Directory-local variables can now be defined. -By default, Emacs looks in .dir-locals.el for directory-local -variables. For more information, see `dir-locals-set-directory-class' -and `dir-locals-set-class-variables'. - -** Emacs can now use `auth-source' for authentication. -`smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain -login names and passwords. The match, if found, is reported -in *Messages* with the password blanked out. - -** `where-is-preferred-modifier' can specify your favorite modifier. - - -* Startup Changes in Emacs 23.1 - -** The option `inhibit-startup-screen' (with aliases to old names -`inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit -display of the initial message in the *scratch* buffer. If you don't -want to display the initial message in the *scratch* buffer at startup, -you can set the option `initial-scratch-message' to nil. - -** New user option `initial-buffer-choice' specifies what to display -after starting Emacs: startup screen, *scratch* buffer, visiting a -file or directory. - -** New alias `argv' for `command-line-args-left' -This is a convenience alias, so that one can write `(pop argv)' -inside of --eval command line arguments in order to access -following arguments. - -** The abbrev file is no longer read at startup in batch mode. - -** Emacs now supports invocation by an X session manager. -It can save a session and restore it later. See the documentation of -the functions `emacs-session-save' and `emacs-session-restore'. -(Actually, this feature was introduced with Emacs 22, but it was not -documented.) - -* Incompatible Editing Changes in Emacs 23.1 - -** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&' -on the regexp command prefix map. - -** In Dired-x, all command guesses for ! are now added to the default -list accessible by M-n instead of pushing all guesses temporarily into -the history list. - -** In Isearch mode, a special case of typing `C-w' at the beginning of -the minibuffer that toggles word search (i.e. using key sequences -`C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key -`M-s w' to start word search, or type `M-s w' in Isearch mode to -toggle word search. To start nonincremental word search you can now use -`M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'. - -** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w' -for word search as well as other search commands from the global prefix -key `M-s'. `Info-search' is still bound to `s', and also incremental -search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching -through multiple Info nodes, together with their nonincremental versions -`C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'. - -** In Text mode, `center-line' and `center-paragraph' are rebound from -`M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global -prefix map `M-o', which is intended for such formatting commands. - -** The following input methods were removed in Emacs 22.2, but this was -not advertised: danish-alt-postfix, esperanto-alt-postfix, -finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix, -norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix, -and swedish-alt-postfix. Use the versions without "alt-", which are -identical. - - -* Editing Changes in Emacs 23.1 - -** The C-n and C-p line-motion commands now move by screen lines, -taking continued lines and variable-width characters into account. -Setting `line-move-visual' to nil reverts this to the previous -behavior (i.e., motion by logical lines based on buffer contents -alone). - -** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now -invokes `suspend-frame'. These changes are for compatibility with the -new multi-tty support (see `Improved X Window System support' above). - -** Mark changes - -*** Transient Mark mode is now on by default. - -*** mark-even-if-inactive now defaults to t - -*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without -activating it. - -*** When Transient Mark mode is on, M-q now fills the region if the -region is active. Otherwise, it fills the current paragraph. - -*** When Transient Mark mode is on, M-$ now checks spelling of the -region if the region is active. Otherwise, it checks spelling of the -word at point. - -*** When Transient Mark mode is on, TAB now indents the region if the -region is active. - -*** The variable `use-empty-active-region' controls whether an empty -active region in Transient Mark mode should make commands operate on -that empty region. - -** Temporarily active regions - -*** The new variable shift-select-mode, non-nil by default, controls -shift-selection. When Shift Select mode is on, shift-translated -motion keys (e.g. S-left and S-down) activate and extend a temporary -region, similar to mouse-selection. - -*** Temporarily active regions, created using shift-selection or -mouse-selection, are not necessarily deactivated in the next command. -They are only deactivated after point motion commands that are not -shift-translated, or after commands that would ordinarily deactivate -the mark in Transient Mark mode (e.g., any command that modifies the -buffer). - -** Minibuffer and completion changes - -*** Emacs may ask for confirmation before opening a non-existent file -or buffer. By default, Emacs requests confirmation if you type RET -immediately after TAB, and the resulting input is not an existing file -or buffer; this usually happens when the minibuffer input did not -complete far enough and you entered RET by mistake. In that case, -Emacs puts the message "[Confirm]" in the minibuffer; type RET again -to create the file or buffer. - -The new variable confirm-nonexistent-file-or-buffer determines whether -Emacs asks for confirmation. The default value is `after-completion'. -If you change it to t, Emacs always asks for confirmation; if you -change it to nil, Emacs never asks for confirmation. - -*** The rules for performing completion have been changed. -When generating completion alternatives, Emacs now takes the -minibuffer text after point, if any, into account: this text is -treated as a substring of the remaining part of the completion -alternative (i.e., the part not matched by the minibuffer text before -point). If no completion alternatives are found this way, Emacs -attempts to perform partial-completion. If still no completion -alternatives are found, we fall back on the Emacs 22 rules for -performing completion. - -The new variable `completion-styles' can be customized to choose your -favorite completion style. - -*** When M-n in the minibuffer reaches the end of the list of defaults, -it adds the completion list to the end, so next M-n continues putting -completion items to the minibuffer. The same principle applies to -incremental search commands as well: C-s or C-M-s starts searching -the default values and after the end of defaults they continue -searching minibuffer completion items. - -*** Minibuffer input of shell commands now comes with completion. - -*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file -name of the current buffer. - -*** In the M-! (shell-command) prompt, M-n provides some default commands. -These are guessed using the file extension of the current file, based -on the file-handlers specified in the operating system's `mailcap' -file. The ! command in Dired (dired-do-shell-command) works -similarly, using the file displayed on the current line. - -*** A list of regexp default values is available via M-n for `occur', -`keep-lines', `flush-lines' and `how-many'. This list includes the active -region in transient-mark-mode, the word under the cursor, the last Isearch -regexp, the last Isearch string and the last replacement regexp. - -*** When enable-recursive-minibuffers is non-nil, operations which use -switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when -used in a minibuffer or a dedicated window. Instead, they fallback on -using pop-to-buffer, which will use some other window. This change -has no effect when enable-recursive-minibuffers is nil (the default). - -*** Isearch started in the minibuffer searches in the minibuffer history. -Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer -history elements, and forward Isearch commands (C-s, C-M-s) search in -next history elements. When the reverse search reaches the first history -element, it wraps to the last history element, and the forward search -wraps to the first history element. When the search is terminated, the -history element containing the search string becomes the current. - -*** The variable read-file-name-completion-ignore-case overrides -completion-ignore-case for file name completion. - -*** The variable read-buffer-completion-ignore-case overrides -completion-ignore-case for buffer name completion. - -*** The new command `minibuffer-force-complete' chooses one of the -possible completions, rather than stopping at the common prefix. - -*** If `completion-auto-help' is `lazy', Emacs shows the completions -buffer only on the second attempt to complete. This was already -supported in `partial-completion-mode'. - -** Face changes - -*** S-down-mouse-1 now pops up a menu for changing the font and text -size of the default face in the current buffer. The face is changed -via face remapping (see Lisp changes, below). - -*** New commands to change the default face size in the current buffer. -To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type -`C-x C--'. To restore the default (global) face size, type `C-x C-0'. -These work via Text Scale mode, a new minor mode. - -The final key in the above commands may be repeated without the -leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by -three steps. Each step scales the height of the default face by the -value of the variable `text-scale-mode-step'. - -*** The commands buffer-face-mode and buffer-face-set can be used to -remap the default face in the current buffer. See "Buffer Face mode", -under New Modes and Packages. - -** Primary selection changes - -*** You can disable kill ring commands from accessing the primary -selection by setting `x-select-enable-primary' to nil. - -** Continuation lines can now be wrapped at word boundaries -(word-wrapping). This is controlled by the new per-buffer variable -`word-wrap'. Word wrapping does not take place if continuation lines -are not shown, e.g. if truncate-lines is non-nil. The most convenient -way to enable word-wrapping is using the new minor mode Visual Line -mode; in addition to setting `word-wrap' to t, this rebinds some -editing commands to work on screen lines rather than text lines. See -New Modes and Packages, below. - -** Window management changes - -*** truncate-partial-width-windows now accepts integer values, which -specify a minimum window width for partial-width windows, below which -lines are truncated. The default has been changed to 50. - -*** The new command balance-windows-area balances windows both -vertically and horizontally. - -*** pop-to-buffer now always sets input focus when the popped-to window -is on a different frame. - -** Miscellaneous changes: - -*** C-l is bound to the new command recenter-top-bottom, rather than recenter. -This moves the current line to window center, top and bottom on -successive invocations. - -*** scroll-preserve-screen-position also preserves the column position. - -*** If `yank-pop-change-selection' is t, rotating the kill ring also -updates the selection or clipboard to the current yank, just as M-w -would do so with the text it copies to the kill ring. - -*** C-M-% now shows replacement as it would look in the buffer, with -`\N' and `\&' substituted according to the match. Old behavior can be -restored by customizing `query-replace-show-replacement'. - -*** The command shell prompts for the default directory, when it is -called with a prefix and the default directory is a remote file name. -This is because some file name handlers (like ange-ftp) are not able to -run processes remotely. - -*** The new command kill-matching-buffers kills buffers whose name -matches a regexp. - -*** The value of comment-style now defaults to `indent'. -Thefore, comment-start markers are inserted at the current indentation -of the region to comment, rather than the leftmost column. - -*** The new commands `pp-macroexpand-expression' and -`pp-macroexpand-last-sexp' pretty-print macro expansions. - -*** The new command `set-file-modes' allows to set file's mode bits. -The mode bits can be specified in symbolic notation, like with GNU -Coreutils, in addition to an octal number. `chmod' is a new -convenience alias for this function. - -*** `next-error-recenter' specifies how next-error should recenter the -visited source file. Its value can be a number (for example, 0 for -top line, -1 for bottom line), or nil for no recentering. - -*** When typing in a password in the echo area, C-y yanks the current -kill into the password. - -*** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters' -are ignored. Customize the `tooltip' face instead. - -*** `mkdir' is a new convenience alias for `make-directory'. - -* New Modes and Packages in Emacs 23.1 - -** Auto Composition Mode is a minor mode that composes characters -automatically when they are displayed. It is globally on by default. -It uses `auto-composition-function' (default `auto-compose-chars'). - -** Bubbles, a new game, is similar to SameGame. - -** Buffer Face mode is a minor mode for remapping the default face in -the current buffer. The variable `buffer-face-mode-face' specifies -the face to remap to. The command `buffer-face-set' prompts for a -face name, sets `buffer-face-mode-face' to it, and enables -buffer-face-mode. See "Face changes", under Editing Changes, for a -description of face remapping. - -** butterfly flips the desired bit on the drive platter. -See http://xkcd.com/378/ - -** bug-reference.el provides clickable links to bug reports. - -** dbus.el provides D-Bus language bindings. -D-Bus is an inter-process communication mechanism for applications -residing on the same host. See the manual for details. - -** DocView mode allows viewing of PDF, PostScript and DVI documents. -One can also search for a regular expression in the document. For -details, see the commentary in doc-view.el. - -PDF and DVI files are now opened in Doc View mode by default. - -In Postcript mode, C-c C-c launches Doc View minor mode for viewing -the postscript file. - -** EasyPG provides an interface to the GNU Privacy Guard (GnuPG). -It includes a GnuPG keyring browser, cryptographic operations on -regions and files, and automatic encryption of *.gpg files. For -details, see the EasyPG Assistant User's Manual. - -** json.el is a library for parsing and generating JSON -(JavaScript Object Notation), a lightweight data-interchange format. - -** linum.el is a new minor mode to display line numbers for the -current buffer. - -** mairix.el is an interface to mairix, a free tool for indexing and -searching locally stored mail. It allows you to query mairix and -display the search results with Rmail, Gnus and VM. Note that there -is an existing Gnus back end, nnmairix.el, which should be used with -Maildir/MH setups. - -** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt. - -** nXML Mode -This is a new mode for editing XML documents. It allows a schema to -be associated with the XML document being edited, using Relax NG as -the schema language. The schema is used to provide two key features: - -*** Continuous validation. nXML validates as you type, highlighting -any invalid parts of your document. - -*** Completion. nXML can assist you in entering an element name, -attribute name or data value by using information about what is -allowed by the schema in that context. - -** proced.el provides a Dired-like interface for operating on -processes. Proced makes an Emacs buffer containing a listing of the -current processes. You can use the normal Emacs commands to move -around in this buffer, and special Proced commands to operate on the -processes listed. It is currently only functional on GNU/Linux, -MS-Windows and Solaris. - -** Remember Mode is a mode for jotting down things to remember. -Notes can be saved to a Diary file. For details, see the Remember -Manual. - -** RST mode is a major mode for editing reStructuredText files. - -** Ruby mode is a major mode for Ruby files. - -** Visual Line mode provides support for editing by visual lines. -It turns on word-wrapping in the current buffer, and rebinds C-a, C-e, -and C-k to commands that operate by visual lines instead of logical -lines. This is a more reliable replacement for longlines-mode. -This can also be turned on using the menu bar, via -Options -> Line Wrapping in this Buffer -> Word Wrap - -** xesam.el is an implementation of Xesam, an interface to (desktop) -search engines like Beagle, Strigi, and Tracker. The Xesam API -requires D-Bus for communication. - -** zeroconf.el offers service discovery and service publishing -interfaces according to the zeroconf specification. It communicates -with Avahi, a zeroconf implementation, via D-Bus messages on systems -which have installed this software. - -** There is a new `whitespace' package. -(The pre-existing one has been renamed to `old-whitespace'.) -Now, besides reporting bogus blanks, the whitespace package has a -minor mode and a global minor mode to visualize blanks (TAB, (HARD) -SPACE and NEWLINE). The visualization is made via faces and/or display -table. It can also indicate lines that extend beyond a given column, -trailing blanks, and empty lines at the start or end of a buffer. -See `whitespace-style' for more details. The `whitespace-action' option -specifies what to do when a buffer is visited, killed, or written. - - -* Changes in Specialized Modes and Packages in Emacs 23.1 - -** Abbrev has been rewritten in Elisp and extended with more flexibility. - -*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put, -abbrev-table-p, abbrev-insert, abbrev-table-menu. - -*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'. - -*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take -extra arguments for arbitrary properties. - -*** New variable `abbrev-minor-mode-table-alist'. - -*** `local-abbrev-table' can hold a list of abbrev-tables. - -*** Abbrevs have now the following special properties: -`:count', `:system', `:enable-function', `:case-fixed'. - -*** Abbrev-tables have now the following special properties: -`:parents', `:case-fixed', `:enable-function', `:regexp', -`abbrev-table-modiff'. - -** Apropos - -*** `apropos-library' describes the elements defined in a given library. - -*** Set `apropos-compact-layout' is you want a more compact (but wider) layout. - -** Archive Mode has basic support to browse Rar archives. -Note, however, that the free version of the unrar command only handles -versions 1 and 2 of the Rar format. - -** BibTeX mode - -*** New command `bibtex-initialize' (re)initializes BibTeX buffers. - -*** New `bibtex-entry-format' options `whitespace', `braces', and -`string', disabled by default. - -*** New variable `bibtex-cite-matcher-alist' contains rules to -identify cited keys in BibTeX entries, used by `bibtex-find-crossref'. - -*** Command `bibtex-url' allows multiple URLs per entry. - -** Bookmarks - -*** bookmark.el saves bookmarks in a pre-Emacs-23-incompatible file format -bookmark.el can read a .emacs.bmk file saved by an older Emacs, but an -older Emacs cannot read one saved by Emacs 23. - -** Calendar and diary - -*** There is a new date style, `iso', essentially year/month/day. -The variable `european-calendar-style' is obsolete - use `calendar-date-style'. -Similarly, the commands `american-calendar' and `european-calendar' -should be replaced by `calendar-set-date-style'. - -*** The calendar namespace has been rationalized. -All functions and variables now begin with a `calendar-', `diary-', or -`holiday-' prefix. The various calendar systems have secondary -prefixes, eg `calendar-french-'. The old names you are likely to use -directly still exist, for the time being, as aliases, but please start -using the new names. - -*** The whitespace in the calendar layout can be customized. -See the variables: -calendar-left-margin, calendar-intermonth-spacing, calendar-column-width, -calendar-day-header-width, and calendar-day-digit-width. - -*** Text (e.g. ISO weeks) can be displayed between the calendar months. -See the variables calendar-intermonth-header and calendar-intermonth-text. - -*** The function `holiday-chinese' computes holidays on the Chinese calendar. -It has been used to add items to the list `holiday-oriental-holidays'. - -*** `diary-remind' accepts a negative number -DAYS as a shorthand for -the list (1 2 ... DAYS). - -** Change Log mode - -*** The new command C-c C-f (change-log-find-file) finds the file -associated with the current log entry. - -*** The new command C-c C-c (change-log-goto-source) goes to the -source code associated with a log entry. - -** Compile and grep modes - -*** The mode-line entry for the *compilation* and *grep* buffer is color coded. -It has different colors for to show that: (a) the command is still -running, (b) successful completion, (c) error. - -*** compilation-auto-jump-to-first-error tells `compile' to jump to -the first error encountered during compilations. - -*** compilation-scroll-output accepts a new value, `first-error', which -says to stop auto scrolling at the first error that occurs. - -*** The `cc' alias for C++ files in `grep-file-aliases' has been -improved. `hh' can be used to match C++ header files and `cchh' both -C++ sources and headers. - -** Copyright - -*** You can specify your copyright holders' names. -Only copyright lines with holders matching `copyright-names-regexp' are -considered for update. - -*** Copyrights can be at the end of the buffer. -This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode). - -** Custom - -*** defcustom accepts new keyword arguments, `:safe' and `:risky', which -set a variable's `safe-local-variable' and `risky-local-variable' property. - -** Diff mode - -*** diff-refine-hunk highlights word-level details of changes in a diff hunk. -It's used automatically as you move through hunks, see -diff-auto-refine-mode. It is bound to `C-c C-b'. - -*** diff-add-change-log-entries-other-window iterates through the diff -buffer and tries to create ChangeLog entries for each change. -It is bound to `C-x 4 A'. - -*** Turning on `whitespace-mode' in a diff buffer will show trailing -whitespace problems in the modified lines. - -** Dired - -*** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode, -and C-x C-q in wdired-mode exits it with asking a question about -saving changes. - -*** `&' runs the command `dired-do-async-shell-command' that executes -the command asynchronously without the need to manually add ampersand -to the end of the command. Its output appears in the buffer `*Async Shell -Command*'. - -*** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names. -When a new user option `dired-isearch-filenames' is t, then even ordinary -Isearch started with `C-s' and `C-M-s' matches only at file names in the -Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of -file name Isearch depends on the position of point - if point is on a file -name initially, then Isearch matches only file names, otherwise it matches -everywhere in the Dired buffer. You can toggle file names matching on or -off by typing `M-s f' in Isearch mode. - -*** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files. -They visit the first marked file in the sequence and display the usual Isearch -prompt for a string or a regexp where all Isearch commands are available. - -*** `Q' in Dired provides two new keys for multi-file replacement. -The upper case key `Y' replaces all remaining matches in all remaining files -with no more questions. The upper case key `N' stops doing replacements -in the current file and skips to the next file. These multi-file keys -are available for all commands that use `tags-query-replace' -including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp', -`reftex-query-replace-document'. - -** Fortran - -*** The line length of fixed-form Fortran is not fixed at 72 any more. -Customize the variable `fortran-line-length' to change it. - -*** In Fortran mode, M-; is now bound to the standard comment-dwim, -rather than fortran-indent-comment. - -*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax. - -** Gnus - -*** The Gnus package has been updated -There are many news features, bug fixes and improvements; see the file -GNUS-NEWS or the node "No Gnus" in the Gnus manual for details. - -*** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for -saving articles drafts and ~/.newsrc.eld. These file may not be read -correctly in Emacs 22 and below. If you want to Gnus across different Emacs -versions, you may set `mm-auto-save-coding-system' to `emacs-mule'. - -*** Passwords are consistently loaded through `auth-source' -Gnus can use `auth-source' for POP and IMAP passwords. Also see that -`smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS -authentication respectively. - -** Help mode - -*** New macro `with-help-window' should set up help windows better -than `with-output-to-temp-buffer' with `print-help-return-message'. - -*** New option `help-window-select' permits to customize whether help -window shall be automatically selected when invoking help. - -*** New variable `help-window-point-marker' permits one to specify a new -position for point in help window (for example in `view-lossage'). - -** Isearch - -*** New command `isearch-forward-word' bound globally to `M-s w' starts -incremental word search. New command `isearch-toggle-word' bound to the -same key `M-s w' in Isearch mode toggles word searching on or off -while Isearch is active. - -*** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch -mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current -search string as its regexp argument. The same key `M-s h r' and -other keys on the `M-s h' prefix are bound globally to the command -`highlight-regexp' and other hi-lock commands. - -*** New command `isearch-occur' bound to `M-s o' in Isearch mode -runs `occur' with the current search string. The same key `M-s o' -is bound globally to the command `occur'. - -*** Isearch can now search through multiple ChangeLog files. -When running Isearch in a ChangeLog file, if the search fails, -then another C-s tries searching the previous ChangeLog, -if there is one (e.g. going from ChangeLog to ChangeLog.12). -This is enabled if multi-isearch-search is non-nil. - -*** Two new commands to start Isearch on a list of marked buffers -for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and -`M-s a M-C-s'. - -*** The part of an Isearch that failed to match is highlighted in -`isearch-fail' face. - -*** `C-h C-h' in Isearch mode displays isearch-specific Help screen, -`C-h b' displays all Isearch key bindings, `C-h k' displays the full -documentation of the given Isearch key sequence, `C-h m' displays -documentation of Isearch mode. All the rest Help commands exit Isearch mode -and execute their global definitions. - -*** When started in the minibuffer, Isearch searches in the minibuffer -history. See `Minibuffer changes', above. - -** MH-E - -*** Upgraded to MH-E version 8.2. See MH-E-NEWS for details. - -** Python -*** The file etc/emacs.py now supports both Python 2 and 3, meaning -that either version can be used as inferior Python by python.el. - -*** Python mode now has `pdbtrack' functionality. When using pdb to -debug a Python program, pdbtrack notices the pdb prompt and displays -the source file and line that the program is stopped at, much the same -way as gud-mode does for debugging C programs with gdb. - -** Recentf - -*** The default value of `recentf-keep' prevents from checking of -remote files, if there is no established connection to the -corresponding remote host. - -** Rmail - -*** Rmail no longer converts the messages to Babyl format. -Instead, it uses UNIX mbox format, both on disk and in Rmail buffers, -and does conversion and decoding when a message is displayed. - -The first time you visit an Rmail file in Babyl format, Rmail -automatically converts it to mbox format. This is a one-time -conversion, but it can take a few minutes, depending on how fast is -your machine and on the size of the file. You should find the rest of -Rmail usage unaltered. - -However, M-x set-rmail-inbox-list now lasts only for one session -because there is no way to save the list of inbox files in an -mbox-format file. - -Also, whereas with Babyl format M-x find-file would switch to Rmail -mode, with mbox format this is no longer the case (there being no way -to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail -instead. - -If you have written any extensions to Rmail, they are likely to need -updating. Conceptually, the Rmail buffer that you see is no longer -just a narrowed portion of the whole. So you cannot access the whole -of a message (or message collection) by a simple save-restriction and -widen. Instead, there are two buffers: the rmail-buffer, and the -rmail-view-buffer. The former is the buffer that you see, the latter -is invisible. Most of the time, the invisible `view' buffer contains -the full contents of the Rmail file, and the Rmail buffer contains a -decoded copy of the current message (with only a subset of the -headers). In this state, Rmail is said to be `swapped'. - -You may find the following functions useful: - -`rmail-get-header' and `rmail-set-header' get or set the value of a -message header, whether or not it is currently visible. - -`rmail-apply-in-message' is a general purpose function that calls a -function (with arguments) which you specify on the full text of a given -message. To further narrow to just the headers, search forward for "\n\n". - -*** The new command `rmail-mime' displays MIME messages. -It is bound to `v' in Rmail buffers and summaries. It displays plain -text and multipart messages in a temporary buffer, and offers buttons -to save attachments. - -*** The command `rmail-redecode-body' no longer accepts the optional arg RAW. -Since Rmail now holds messages in their original undecoded form in a -separate buffer, `rmail-redecode-body' no longer encodes the original -message, and therefore there should be no need to avoid encoding it. - -*** The o command is now `rmail-output'. It is an all-purpose command -for copying messages from Rmail and appending them to files. It -handles Babyl-format files as well as mbox-format files, and it -handles both kinds properly when they are visited in Emacs. It always -copies the full headers of the message. - -*** The C-o command is now `rmail-output-as-seen'. It uses -the message as displayed, appending it to an mbox file. - -*** The modified status of the Rmail buffer is reported in the mode-line. -Previously, this information was hidden. - -** TeX modes - -*** New option latex-indent-within-escaped-parens -permits to customize indentation of LaTeX environments delimited -by escaped parens. - -** T-mouse Mode - -*** If the gpm mouse server is running and t-mouse-mode is enabled, -Emacs uses a Unix socket in a GNU/Linux console to talk to server, -rather than faking events using the client program mev. This C level -approach provides mouse highlighting and help echoing in the -minibuffer. - -** Tramp - -*** New connection methods. -The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have -been introduced. There are also new so-called gateway methods -"tunnel" and "socks". - -*** IPv6 addresses. -IPv6 addresses are supported now as host names. They must be embedded -in square brackets, like in "/ssh:[::1]:". - -*** Multihop syntax has been removed. -The pseudo-method "multi" has been removed. Instead, multi hops -can be specified by the new variable `tramp-default-proxies-alist'. - -*** More default settings. -Default values can be set via the variables `tramp-default-user', -`tramp-default-user-alist' and `tramp-default-host'. - -*** Connection information is cached. -In order to reduce connection setup, information about used -connections is kept persistently in a file. The name of this file is -defined in the variable `tramp-persistency-file-name'. - -*** Control of remote processes. -Running processes on a remote host can be controlled by settings in -`tramp-remote-path' and `tramp-remote-process-environment'. - -*** Success of remote copy is checked. -When the variable `file-precious-flag' is set, the success of a remote -file copy is checked via the file's checksum. - -*** Passwords can be read from an authentification file. -Tramp uses the package `auth-source' to read passwords from a file, if -necessary. - -** VC and related modes - -*** VC now supports applying VC operations to a set of files at a time. -This enables VC to work much more effectively with changeset-oriented -version-control systems such as Subversion, GNU Arch, Mercurial, Git -and Bzr. VC will now pass a multiple-file commit to these systems as -a single changeset. - -*** vc-dir is a new command that displays file names and their VC -status. It allows to apply various VC operations to a file, a -directory or a set of files/directories. - -*** VC switches are no longer appended, rather the first non-nil value is used. -(This was for the most part true in Emacs 22, but was not advertised). -This is because there is an increasing variety of VC systems, and they -do not all accept the same "common" options. For example, a CVS diff -command used to append the values of `vc-cvs-diff-switches', -`vc-diff-switches', and `diff-switches'. Now the first non-nil value -from that sequence is used. The special value `t' means "no switches". - -*** Clicking on the VC mode-line entry now pops the VC menu. - -*** The VC mode-line entry now has a tooltip that explains the VC file status. - -*** In VC Annotate mode, the key bindings have changed to use lower -case keys instead of the upper case keys used in the past. - -*** In VC Annotate mode, for VC systems that support changesets, you can -see the diff for the whole changeset (not only for the current file) -by typing the D key. Using the "Show changeset diff of revision at -line" menu entry does the same thing. - -*** In VC Annotate mode, you can type v to toggle the annotation visibility. - -*** In VC Annotate mode, you can type f to show the file revision on -the current line. - -*** Asynchronous VC commands display [Waiting...] in the mode-line -of the corresponding buffer as long as the asynchronous process is -active. - -*** Log entries can be modified using the key "e" in log-view. -For now only CVS, RCS, SCCS and SVN support this functionality. -This is done by the `modify-change-comment' backend function. - -*** In log-view-mode, for VC systems that support changesets, you can -see the diff for the whole changeset (not only for the current file) -by typing the D key or using the "Changeset Diff" menu entry. - -*** In Log Edit mode, C-c C-d now shows the diff for the files involved. - -*** vc-git supports the "git grep" command. - -*** VC Support for Meta-CVS has been removed for lack of a maintainer able -to update it to the new VC. - -** Miscellaneous - -*** comint-mode uses `start-file-process' now (see Lisp Changes). -If `default-directory' is a remote file name, subprocesses are started -on the corresponding remote system. - -*** Eldoc highlights the function argument under point -with the face `eldoc-highlight-function-argument'. - -*** In Etags, the --members option is now the default. -Use --no-members if you want the old default behavior of not tagging -struct members in C, members variables in C++ and variables in PHP. - -*** The `gdb' command only works with the graphical interface now. -Use `gud-gdb' if you want the (old) text command mode. - -*** goto-address.el provides two new minor modes, goto-address-mode and -goto-address-prog-mode, which buttonize URLS and email addresses. - -*** The new command `eshell/info' runs info in an eshell buffer. - -*** The new variable `ffap-rfc-directories' specifies a list of local -directories in which `ffap-rfc' will first search for RFCs. - -*** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them. -See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'. - -*** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'. - -*** Info displays breadcrumbs in the header of the page. -See Info-breadcrumbs-depth to control it. - -*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'. -It is used to configure wireless interfaces. - -*** The pcmpl-unix package supports hostname completion for ssh and scp. - -*** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs. - -*** smerge-refine highlights word-level details of changes in conflict. -It's used automatically as you move through conflicts, see -smerge-auto-refine-mode. - -*** talk.el has been extended for multiple tty support. - -*** A new command `display-time-world' has been added to the Time -package. It creates a buffer with an updating time display using -several time zones. - -*** The appearance of superscript and subscript in TeX is more customizable. -See the documentation of the variables: tex-fontify-script, -tex-font-script-display, tex-suscript-height-ratio, and -tex-suscript-height-minimum. - -*** view-remove-frame-by-deleting is now by default t -since users found iconification of view-mode frames distracting. - -*** WoMan tries to add locale-specific manual page directories to the -search path. This can be disabled by setting `woman-locale' to nil. +* Installation Changes in Emacs 24.1 -* Changes in Emacs 23.1 on non-free operating systems - -** Case is now considered significant in completion on MS-Windows. -The default value of `completion-ignore-case' is now nil on -MS-Windows, the same as it is for other operating systems. The -variable doesn't apply to reading a file name -- in that case Emacs -heeds `read-file-name-completion-ignore-case' instead. - -** IPv6 is supported on MS-Windows. -Emacs now supports IPv6 on Windows XP and later, and earlier versions -of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was -supported on other platforms, but not on Windows due to using the winsock -1.1 header file, even though Emacs was linking to the winsock 2 library. - -** Busy cursor (hourglass) now displays on MS-Windows. -When Emacs is busy, an hourglass mouse cursor is displayed on Windows. -In Emacs 22 only X supported the busy cursor. - -** Battery status is available on MS-Windows -Emacs can now display the battery status in the mode-line when enabled with -display-battery-mode or from the Options menu. More verbose battery -information is also available with the command `battery'. In Emacs 22 -battery status was supported only on GNU/Linux and Mac. - -** More keys available on MS-Windows. -Keys normally associated with IMEs, and some exotic keys not normally found -on standard keyboards have been given names so they can be bound to functions -inside Emacs. If there are keys on your keyboard that have not been exposed -to Emacs in the past, try C-h k to see if they are available now. - -Emacs can now bind functions to the extra buttons for media player and -browser control present on some keyboards. These buttons are disabled -by default, since enabling them prevents their system-wide use when -Emacs has focus. To enable them, set the variable -w32-pass-multimedia-buttons to nil. See the doc string of that variable -for the list of extra keys that are available. - -** BDF fonts no longer supported on MS-Windows. -The font backend was completely rewritten for this release. The focus -on Windows has been getting acceptable performance and full unicode -support, including complex script shaping for native Windows fonts. A -rewrite of the BDF font support has not happened due to lack of time -and developers. If demand still exists for such a backend even with -the improved language support for native Windows fonts, future -development in this direction will most likely be based on the -freetype library, giving access to a wider range of font formats. +* Startup Changes in Emacs 24.1 -* Incompatible Lisp Changes in Emacs 23.1 - -** Variables cannot be both buffer-local and frame-local any more. - -** `functionp' returns nil for special forms. -I.e., it only returns t for objects that can be passed to `funcall'. - -** The behavior of map-char-table has changed. It may call the -specified function with a cons (FROM . TO) as a key if characters in -that range have the same value. - -** Process changes - -*** The function `dired-call-process' has been removed. - -*** The multibyteness of process filters is now determined by the -coding-system used for decoding. The functions -`process-filter-multibyte-p' and `set-process-filter-multibyte' are -obsolete. - -** The variable `byte-compile-warnings' can now be a list starting with `not', -meaning to disable the specified warnings. The meaning of this list -may therefore be the reverse of what you expect (of course, this is -only an issue if you make use of the new `not' syntax). Rather than -checking/manipulating elements directly, use the new functions -`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and -`byte-compile-enable-warning.' - -** `mode-name' is no longer guaranteed to be a string. -Use `(format-mode-line mode-name)' to ensure a string value. - -** The function x-font-family-list has been removed. -Use the new function font-family-list (see Lisp Changes, below). - -** Internationalization changes - -*** The value of the function `charset-id' is now always 0. - -*** The functions `register-char-codings' and `coding-system-spec' -have been removed. - -*** The cpXXX coding systems are now supported automatically. -The functions cp-...-codepage, which you had to use in Emacs 22 to -enable support for these coding systems, have been deleted. - -*** The following features have been removed. They were used for -displaying various scripts with specific fonts, and are no longer -needed now that OpenType font support is available: - -**** `devanagari' and `devan-util', and all associated devanagari-* and -dev-* functions and variables (formerly used for Devanagari script). - -**** `kannada' and `knd-util', and all associated kannada-* and knd-* -functions and variables (formerly used for Kannada script). - -**** `malayalam' and `mlm-util', and all associated malayalam-* and -mlm-* functions and variables (formerly used for Malayalam script). - -**** `tamil' and `tml-util, and all associated tamil-* and tml-* -functions and variables (formerly used for Tamil script). - -*** The meaning of NAME argument of `set-fontset-font' is changed. -Previously nil is accepted as the default fontset. Now, nil is for -the fontset of the selected frame and t is for the default fontset. - -*** The meaning of FONTSET argument of `print-fontset' is changed. -Now, nil is for the fontset of the selected frame and t is for the -default fontset. - -** If a function in write-region-annotate-functions returns with a -different buffer current, Emacs no longer kills that buffer -automatically. This behavior existed in previous versions of Emacs, -but was undocumented. To kill a buffer after write-region, give the -variable `write-region-post-annotation-function' a buffer-local value -of `kill-buffer'. - -** The variable temp-file-name-pattern has been removed. -This variable was only used by call-process-region, which now uses -temporary-file-directory instead. - -** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been -removed. The function now takes extra arguments for specifying -arbitrary abbrev properties. - -** end-of-defun-function is now guaranteed to work only when called -from the start of a defun. It must now leave point exactly at the end -of defun, since `end-of-defun' now itself moves forward over -whitespace after calling it. +* Changes in Emacs 24.1 -* Lisp Changes in Emacs 23.1 - -** The new variable `generate-autoload-cookie' controls the magic comment -string used by `update-file-autoloads' to find autoloaded forms. The -variable `generated-autoload-file' similarly controls the name of the -file where `update-file-autoloads' writes the calls to `autoload'. -The default values are ";;;###autoload" and `loaddefs.el', -respectively. - -** New primitives `list-system-processes' and `process-attributes' -let Lisp programs access the processes that are running on the local -machine. See the doc strings of these functions for more details. -Not all platforms support accessing this information; on those that -don't, these primitives will return nil. - -** New variable `user-emacs-directory'. -Use this instead of "~/.emacs.d". - -** If a local hook function has a non-nil `permanent-local-hook' -property, `kill-all-local-variables' does not remove it from the local -value of the hook variable; it remains even if you change major modes. - -** `frame-inherited-parameters' lets new frames inherit parameters from -the selected frame. - -** New keymap `input-decode-map' overrides like key-translation-map, but -applies before function-key-map. Also it is terminal-local contrary to -key-translation-map. Terminal-specific key-sequences are generally added to -this map rather than to function-key-map now. - -** `ignore-errors' is now a standard macro (does not require the CL package). - -** `interprogram-paste-function' can now return one string or a list -of strings. In the latter case, Emacs puts the second and following -strings on the kill ring. - -** In `condition-case', a handler can specify "let the debugger run first". -You do this by writing `debug' in the list of conditions to be handled, -like this: - - (condition-case nil - (foo bar) - ((debug error) nil)) - -** clone-indirect-buffer now runs the clone-indirect-buffer-hook. - -** `beginning-of-defun-function' now takes one argument, the count given to -`beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any -arguments.) - -** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED. -IDENTIFICATION specifies which part of the remote identifier has to be -returned. With CONNECTED passed non-nil, it is checked whether a -remote connection has been established already. - -** The new macro `declare-function' suppresses compiler warnings about -undefined functions. - -** Changes to interactive function handling - -*** The new interactive spec code ^ says to first call -handle-shift-selection if shift-select-mode is non-nil, before reading -the command arguments. This is used for shift-selection (see above). - -*** Built-in functions can now have an interactive specification that -is not a prompt string. If the `intspec' parameter of a `DEFUN' -starts with a `(', the string is evaluated as a Lisp form. - -*** The interactive-form of a function can be added post-facto via the -`interactive-form' symbol property. Mostly useful to add complex -interactive forms to subroutines. - -** Region changes - -*** Commands should use `use-region-p' to test whether there is -an active region that they should operate on. - -*** `region-active-p' returns non-nil when Transient Mark mode is -enabled and the mark is active. Most commands that act specially on -the active region in Transient Mark mode should use `use-region-p' -instead of `region-active-p', because `use-region-p' obeys the new -user option `use-empty-active-region' (see Editing Changes, above). - -*** If a command sets `transient-mark-mode' to (only . OLDVAL), that -means to activate transient-mark-mode temporarily, until the next -unshifted point motion command or mark deactivation. Afterwards, -reset transient-mark-mode to the value OLDVAL. The values `only' and -`identity', introduced in Emacs 22, are now deprecated. - -** Emacs session information - -*** The new variables `before-init-time' and `after-init-time' record the -value of `current-time' before and after Emacs loads the init files. - -*** The new function `emacs-uptime' returns the uptime of an Emacs instance. - -*** The new function `emacs-init-time' returns the duration of the -Emacs initialization. - -** Changes affecting display-buffer - -*** display-buffer tries to be smarter when splitting windows. -The new option split-window-preferred-function lets you specify your own -function to pop up new windows. Its default value split-window-sensibly -can split a window either vertically or horizontally, whichever seems -more suitable in the current configuration. You can tune the behavior -of split-window-sensibly by customizing split-height-threshold and the -new option split-width-threshold. Both options now take the value nil -to inhibit splitting in one direction. Setting split-width-threshold to -nil inhibits horizontal splitting and gets you the behavior of Emacs 22 -in this respect. In any case, display-buffer may now split the largest -window vertically even when it is not as wide as the containing frame. - -*** If pop-up-frames has the value `graphic-only', display-buffer only -makes a separate frame on graphic displays. - -*** select-frame and set-frame-selected-window have a new optional -argument NORECORD. If non-nil, this will avoid messing with the order -of recently selected windows and the buffer list. - -** Window parameters can now be defined. -These are analogous to frame parameters, but are associated with -individual windows. - -*** The new functions window-parameters, window-parameter, and -set-window-parameter are used to query and set window parameters. - -** Minibuffer and completion changes - -*** A list of default values can be specified for the DEFAULT argument of -functions `read-from-minibuffer', `read-string', `read-command', -`read-variable', `read-buffer', `completing-read'. Elements of this list -are available for inserting into the minibuffer by typing `M-n'. -For empty input these functions return the first element of this list. - -*** New function `read-regexp' uses the regexp history and some useful -regexp defaults (string at point, last Isearch/replacement regexp/string) -via M-n when reading a regexp in the minibuffer. - -*** minibuffer-local-must-match-filename-map is now named -minibuffer-local-filename-must-match-map. - -*** The `require-match' argument to `completing-read' accepts the new -values `confirm-only' and `confirm-after-completion'. - -** Search and replacement changes - -*** The regexp form \(?:\) specifies the group number explicitly. - -*** New function `match-substitute-replacement' returns the result of -`replace-match' without actually using it in the buffer. - -*** The new variable `replace-search-function' determines the function -to use for searching in query-replace and replace-string. The -function it specifies is called by `perform-replace' when its 4th -argument is nil. - -*** The new variable `replace-re-search-function' determines the -function to use for searching in `query-replace-regexp', -`replace-regexp', `query-replace-regexp-eval', and -`map-query-replace-regexp'. The function it specifies is called by -`perform-replace' when its 4th argument is non-nil. - -*** New keymap `search-map' bound to `M-s' provides global bindings -for search related commands. - -*** New keymap `multi-query-replace-map' contains additonal keys bound -to `automatic-all' and `exit-current' for multi-buffer interactive replacement. - -*** The variable `inhibit-changing-match-data', if non-nil, prevents -the search and match primitives from changing the match data. - -*** New functions `word-search-forward-lax' and `word-search-backward-lax'. -These are like `word-search-forward and `word-search-backward', except -that the end of the search string need not match a word boundary, -unless it ends in whitespace. - -** File handling changes - -*** set-file-modes is now interactive and can take the mode value in -symbolic notation thanks to auxiliary functions. - -*** file-local-variables-alist stores an alist of file-local -variables defined in the current buffer. - -** Face-remapping - -*** Each face can be remapped to a different face definition using the -variable `face-remapping-alist'. This is an alist that maps faces to -replacement definitions (which can be face names, lists of face names, -or attribute/value plists. If this variable is buffer-local, the -remapping occurs only in that buffer. - -*** text-scale-mode remaps the default face to a larger or smaller -size in the current buffer. This feature is used by the Buffer Face -menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see -Editing Changes, above). - -*** New functions: - -**** `face-remap-add-relative' adds a face remapping entry to the -current buffer. - -**** ``face-remap-remove-relative' removes a face remapping entry from -the current buffer. - -**** `face-remap-reset-base' restores a face to its global definition. - -**** `face-remap-set-base' sets the base remapping of a face. - -** Process changes - -*** The new function `start-file-process' is similar to `start-process', -but obeys file handlers. The file handler is chosen based on -`default-directory'. The functions `start-file-process-shell-command' -and `process-file-shell-command' are also new; they call internally -`start-file-process' and `process-file', respectively. - -*** The new function `process-lines' executes an external program and -returns its output as a list of lines. - -** Character code, representation, and charset changes. - -*** In multibyte buffers and strings, characters are represented by -UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF -with no gap; code points 0x0..0x10FFFF are Unicode characters of the -same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit -bytes. - -*** Generic characters no longer exist. - -*** The concept of a charset has changed. A single character may -belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets -unicode, iso-8859-1, iso-8859-3, etc). - -**** The dimension of a charset is now 1, 2, 3, or 4, and the size of -each dimension is no longer limited to 94 or 96. - -**** A dynamic charset priority list is used to infer the charset of -characters for display. - -*** The functions `split-char' and `make-char' now accept up to 4 -positional codes instead of just 2. - -*** The functions `encode-char' and `decode-char' now accept any character sets. - -*** The function `define-charset' now accepts a completely different -form of arguments (old-style arguments still work). - -*** The value of the function `char-charset' depends on the current -priorities of charsets. - -*** The function get-char-code-property now accepts many Unicode base -character properties. They are `name', `general-category', -`canonical-combining-class', `bidi-class', `decomposition', -`decimal-digit-value', `digit-value', `numeric-value', `mirrored', -`old-name', `iso-10646-comment', `uppercase', `lowercase', and -`titlecase'. - -*** The functions `modify-syntax-entry' and `modify-category-entry' now -accept a cons of characters as the first argument, and modify all -entries in that range of characters. - -*** Use of `translation-table-for-input' for character code unification -is now obsolete, since Emacs 23.1 and later uses Unicode as basis for -internal representation of characters. - -*** New functions: - -**** `characterp' returns t if and only if the argument is a character. -This replaces `char-valid-p', which is now obsolete. - -**** `max-char' returns the maximum character code (currently #x3FFFFF). - -**** `define-charset-alias' defines an alias of a charset. - -**** `set-charset-priority' sets priorities of charsets. - -**** `charset-priority-list' returns a prioritized list of charsets. - -**** `unibyte-string' makes a unibyte string from bytes. - -**** `define-char-code-property' defines a character code property. - -**** `char-code-property-description' returns the description string of -a character code property. - -*** New variables: - -**** `find-word-boundary-function-table' is a char-table of functions to -search for a word boundary. - -**** `char-script-table' is a char-table of script names. - -**** `char-width-table' is a char-table of character widths. - -**** `print-charset-text-property' controls how to handle `charset' text -property on printing a string. - -**** `printable-chars' is a char-table of printable characters. - -** Code conversion changes - -*** The new function `define-coding-system' should be used to define a -coding system instead of `make-coding-system' (which is now obsolete). - -*** The functions `encode-coding-region' and `decode-coding-region' -have an optional 4th argument to specify where the result of -conversion should go. - -*** The functions `encode-coding-string' and `decode-coding-string' -have an optional 4th argument specifying a buffer to store the result -of conversion. - -*** The new variable `inhibit-null-byte-detection' controls whether to -consider text with null bytes as binary data. By default, it is -`nil', and Emacs uses `no-conversion' for any text containing null -bytes. - -*** The functions `set-coding-priority' and `make-coding-system' are obsolete. - -*** New functions: - -**** `with-coding-priority' executes Lisp code using the specified -coding system priority order. - -**** `check-coding-systems-region' checks if the text in the region is -encodable by the specified coding systems. - -**** `coding-system-aliases' returns a list of aliases of a coding system. - -**** `coding-system-charset-list' returns a list of charsets supported -by a coding system. - -**** `coding-system-priority-list' returns a list of coding systems -ordered by their priorities. - -**** `set-coding-system-priority' sets priorities of coding systems. - -**** `coding-system-from-name' returns a coding system matching with -the argument name. - -** There is a new input method, Robin, different from Quail. -It has three functionalities: - i) a simple input method (converts an ASCII sequence into a string). -ii) converts an existing buffer substring into another string -iii) reverse conversion (each character produced by a -robin rule can hold the original ASCII sequence as a char-code-property) - -*** The new function `robin-define-package' defines a Robin package. - -*** The new function `robin-modify-package' modifies an existing Robin package. - -*** The new function `robin-use-package' starts using a Robin package -as an input method. - -*** The new function `string-to-unibyte' is like `string-as-unibyte' -but signals an error if STRING contains a non-ASCII, non-eight-bit -character. - -** Changes related to the new font backend - -*** Which font backends to use can be specified by the X resource -"FontBackend". For instance, to use both X core fonts and Xft fonts: - -Emacs.FontBackend: x,xft - -If this resource is not set, Emacs tries to use all font backends -available on your graphic device. - -*** New frame parameter `font-backend' specifies a list of -font-backends supported by the frame's graphic device. On X, they are -currently `x' and `xft'. - -*** The function `set-fontset-font' now accepts a script name as the -second argument, and has an optional 5th argument to control how to -set the font. - -*** New functions: - -**** `fontp' checks if the argument is a font-spec or font-entity. - -**** `font-spec' creates a new font-spec object. - -**** `font-get' returns a font property value. - -**** `font-put' sets a font property value. - -**** `font-face-attributes' returns a plist of face attributes set by a font. - -**** `list-fonts' returns a list of font-entities matching a font spec. - -**** `find-font' returns the font-entity best matching the given font spec. - -**** `font-family-list' returns a list of family names of available fonts. - -**** `font-xlfd-name' returns an XLFD name of a given font spec, font -entity, or font object. - -**** `clear-font-cache' clears all font caches. - -** Changes related to multiple-terminal (multi-tty) support - -*** $TERM is now set to `dumb' for subprocesses. If you want to know the -$TERM inherited by Emacs you will have to look inside initial-environment. - -*** $DISPLAY is now dynamically inherited from the frame's `display'. - -*** The `window-system' variable is now frame-local. The new -`initial-window-system' variable contains the `window-system' value -for the first frame. `window-system' is also now a function that -takes a frame argument. - -*** The `keyboard-translate-table' variable and the terminal and -keyboard coding systems are now terminal-local. - -*** You can specify a terminal device (`tty' parameter) and a terminal -type (`tty-type' parameter) to `make-terminal-frame'. - -*** The function `make-frame-on-display' now works during a tty -session. - -*** A new `terminal' data type. -The functions `get-device-terminal', `terminal-parameters', -`terminal-parameter', `set-terminal-parameter' use this data type. - -*** Function key sequences are now mapped using `local-function-key-map', -a new variable. This inherits from the global variable function-key-map, -which is not used directly any more. - -*** New hooks: - -**** before-hack-local-variables-hook is called after setting new -variable file-local-variables-alist, and before actually applying the -file-local variables. - -**** `suspend-tty-functions' and `resume-tty-functions' are called -after a tty frame has been suspended or resumed, respectively. The -functions are called with the terminal id of the frame being -suspended/resumed as a parameter. - -**** The special hook `delete-terminal-functions' is called before -deleting a terminal. - -*** New functions: - -**** `delete-terminal' - -**** `suspend-tty' - -**** `resume-tty'. - -*** `initial-environment' holds the environment inherited from Emacs's parent. - -** Redisplay changes - -*** For underlined characters, the distance between the underline and -the baseline is controlled by a new variable, `underline-minimum-offset'. - -*** You can now pass the value of the `invisible' property to -invisible-p to check whether it would cause the text to be invisible. -This is convenient when checking invisibility of text with no buffer -position (e.g. in before/after-strings). - -*** `clear-image-cache' can be told to flush only images of a specific file. - -*** `vertical-motion' can now be given a goal column. -It now accepts a cons cell (COLS . LINES) in its first argument, which -says to stop, where possible, at a pixel x-position equal to COLS -times the default column width. - -*** redisplay-end-trigger-functions, set-window-redisplay-end-trigger, -and window-redisplay-end-trigger are obsolete. Use `jit-lock-register' -instead. - -*** The new variables `wrap-prefix' and `line-prefix' specify display -specs which are appended at display-time to every continuation line -and non-continuation line, respectively. In addition, Emacs -recognizes the `wrap-prefix' and `line-prefix' text or overlay -properties; these have the same effects as the variables of the same -name, but take precedence. - -** The Lisp interpreter now treats non-breaking space as whitespace. - -** Miscellaneous new functions - -*** `apply-partially' performs a "curried" application of a function. - -*** `buffer-swap-text' swaps text between two buffers. This can be -useful for modes such as tar-mode, archive-mode, RMAIL. - -*** `combine-and-quote-strings' produces a single string from a list of strings -sticking a separator string in between each pair, and quoting those -strings that include the separator as their substring. Useful for -consing shell command lines from the individual arguments. - -*** `custom-note-var-changed' tells Custom to treat the change in a -certain variable as having been made within Custom. - -*** `face-all-attributes' returns an alist describing all the basic -attributes of a given face. - -*** `format-seconds' converts a number of seconds into a readable -string of days, hours, etc. - -*** `image-refresh' refreshes all images associated with a given image -specification. - -*** `locate-user-emacs-file' helps packages to select the appropriate -place to save user-specific files. It defaults to `user-emacs-directory' -unless the file already exists at $HOME. - -*** `read-color' reads a color name using the minibuffer. - -*** `read-shell-command' does what its name says, with completion. It -uses the minibuffer-local-shell-command-map for that. - -*** `split-string-and-unquote' splits a string into a list of substrings -on the boundaries of a given delimiter, and unquotes the substrings that -are quoted. Useful for taking apart shell commands. - -*** The two new functions `looking-at-p' and `string-match-p' can do -the same matching as `looking-at' and `string-match' without changing -the match data. - -*** The two new functions `make-serial-process' and -`serial-process-configure' provide a Lisp interface to the new serial -port support (see Emacs changes, above). - -** Miscellaneous new variables - -*** `auto-save-include-big-deletions', if non-nil, means auto-save is -not turned off automatically after a big deletion. - -*** `read-circle', if nil, disables the reading of recursive Lisp -structures using the #N= and #N# syntax. - -*** `this-command-keys-shift-translated' is non-nil if the key -sequence invoking the current command was found by shift-translation. - -*** `window-point-insertion-type' determines the insertion-type of the -marker used for window-point. - -*** bookmark provides `bookmark-make-record-function' so special major -modes like Info can teach bookmark.el how to save and restore the -relevant data. - -*** `fill-forward-paragraph-function' specifies which function the -filling code should use to find paragraph boundaries. +* Editing Changes in Emacs 24.1 -* New Packages for Lisp Programming in Emacs 23.1 +* Changes in Specialized Modes and Packages in Emacs 24.1 -** The new package avl-tree.el deals with the AVL tree data structure. - -** The new package check-declare.el verifies the accuracy of -declare-function macros (see Lisp Changes, above). + +* New Modes and Packages in Emacs 24.1 -** find-cmd.el can build `find' commands using lisp syntax. + +* Incompatible Lisp Changes in Emacs 24.1 -** The package misearch.el has been added. It allows Isearch to search -through multiple buffers. A variable `multi-isearch-next-buffer-function' -defines the function to call to get the next buffer to search in the series -of multiple buffers. Top-level functions `multi-isearch-buffers', -`multi-isearch-buffers-regexp', `multi-isearch-files' and -`multi-isearch-files-regexp' accept a single argument that specifies -a list of buffers/files to search for a string/regexp. + +* Lisp changes in Emacs 24.1 -** The new major mode `special-mode' is intended as a parent for -major modes such as those that set the "'mode-class 'special" property. + +* Changes in Emacs 24.1 on non-free operating systems ---------------------------------------------------------------------- @@ -2415,5 +70,3 @@ Local variables: mode: outline paragraph-separate: "[ ]*$" end: - -arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2 diff --git a/etc/NEWS.23 b/etc/NEWS.23 new file mode 100644 index 00000000000..00c4765f822 --- /dev/null +++ b/etc/NEWS.23 @@ -0,0 +1,2419 @@ +GNU Emacs NEWS -- history of user-visible changes. + +Copyright (C) 2007, 2008, 2009, 2010 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 23. + +See files 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' +with a prefix argument or by typing C-u C-h C-n. + + +Temporary note: + +++ indicates that the appropriate manual has already been updated. + --- means no change in the manuals is called for. +When you add a new item, please add it without either +++ or --- +so we will look at it and add it to the manual. + + +* Installation Changes in Emacs 23.2 + +** New configure options for Emacs developers +These are not new features; only the configure flags are new. +--- +*** --enable-profiling builds Emacs with profiling enabled. +This might not work on all platforms. +--- +*** --enable-checking[=OPTIONS] builds emacs with extra runtime checks. + +--- +** `make install' now consistently ignores umask, creating a +world-readable install. + +** Emacs compiles with Gconf support, if it is detected. +Use the configure option --without-gconf to disable this. + +* Startup Changes in Emacs 23.2 ++++ +** The command-line option -Q (--quick) also inhibits loading X resources. +However, if Emacs is compiled with the Lucid or Motif toolkit, X +resource settings for the graphical widgets are still applied. +On Windows, the -Q option causes Emacs to ignore Registry settings, +but environment variables set on the Registry are still honored. ++++ +*** The new variable `inhibit-x-resources' shows whether X resources +were loaded. + ++++ +** New command-line option -mm (--maximized) maximizes the initial frame. + +* Changes in Emacs 23.2 + ++++ +** The maximum size of buffers (and the largest fixnum) is doubled. +On typical 32bit systems, buffers can now be up to 512MB. + +--- +** The default value of `trash-directory' is now nil. +This means that `move-file-to-trash' trashes files according to +freedesktop.org specifications, the same method used by the Gnome, +KDE, and XFCE desktops. (This change has no effect on Windows, which +uses `system-move-file-to-trash' for trashing.) + ++++ +** The pointer now becomes invisible when typing. +Customize `make-pointer-invisible' to disable this feature. + +** Font changes + +*** Emacs can use the system default monospaced font in Gnome. +To enable this feature, set `font-use-system-font' to non-nil (it is +nil by default). If the system default changes, Emacs changes also. +This feature requires Gconf support, which is automatically included +at compile-time if configure detects the gconf libraries (you can +disable this with the configure option --without-gconf). + +*** On X11, Emacs reacts to Xft changes made by configuration tools, +via the XSETTINGS mechanism. This includes antialias, hinting, +hintstyle, RGBA, DPI and lcdfilter changes. + ++++ +** Killing a buffer with a running process now asks for confirmation. +To remove this query, remove `process-kill-buffer-query-function' from +`kill-buffer-query-functions', or set the appropriate process flag +with `set-process-query-on-exit-flag'. + +** File-local variable changes ++++ +*** Specifying a minor mode as a local variables enables that mode, +unconditionally. The previous behavior, toggling the mode, was +neither reliable nor generally desirable. + +*** New commands for adding and removing file-local variables: +`add-file-local-variable', `delete-file-local-variable', +`add-file-local-variable-prop-line', and +`delete-file-local-variable-prop-line'. + +*** New commands for adding and removing directory-local variables, +and copying them to and from file-local variable lists: +`add-dir-local-variable', `delete-dir-local-variable', +`copy-dir-locals-to-file-locals', +`copy-dir-locals-to-file-locals-prop-line' and +`copy-file-locals-to-dir-locals'. + +** Internationalization changes ++++ +*** Unibyte sessions are now considered obsolete. +This refers to the EMACS_UNIBYTE environment variable as well as the +--unibyte, --multibyte, --no-multibyte, and --no-unibyte command line +arguments. Customizing enable-multibyte-characters and setting +default-enable-multibyte-characters are also deprecated. +--- +*** New coding system `utf-8-hfs'. +This is suitable for default-file-name-coding-system on Mac OS X; see +international/ucs-normalize.el. + +--- +** Function arguments in *Help* buffers are now shown in upper-case. +Customize `help-downcase-arguments' to t to show them in lower-case. + + +* Editing Changes in Emacs 23.2 + +** Kill-ring and selection changes ++++ +*** If `select-active-regions' is t, any active region automatically +becomes the primary selection (for interaction with other window +applications). If you enable this, you might want to bind +`mouse-yank-primary' to Mouse-2. ++++ +*** When `save-interprogram-paste-before-kill' is non-nil, the kill +commands save the interprogram-paste selection into the kill ring +before doing anything else. This avoids losing the selection. ++++ +*** When `kill-do-not-save-duplicates' is non-nil, identical +subsequent kills are not duplicated in the `kill-ring'. + +** Completion changes + +*** The new command `completion-at-point' provides mode-sensitive completion. + +*** tab-always-indent set to `complete' lets TAB do completion as well. ++++ +*** The new completion-style `initials' is available. +For instance, this can complete M-x lch to list-command-history. + +*** The new variable `completions-format' determines how completions +are displayed in the *Completions* buffer. If you set it to +`vertical', completions are sorted vertically in columns. + ++++ +** The default value of `blink-matching-paren-distance' is increased. + +--- +** M-n provides more default values in the minibuffer for commands +that read file names. These include the file name at point (when ffap +is loaded without ffap-bindings), the file name on the current line +(in Dired buffers), and the directory names of adjacent Dired windows +(for Dired commands that operate on several directories, such as copy, +rename, or diff). + ++++ +** M-r is bound to the new `move-to-window-line-top-bottom'. +This moves point to the window center, top and bottom on successive +invocations, in the same spirit as the C-l (recenter-top-bottom) +command. + ++++ +** The new variable `recenter-positions' determines the default +cycling order of C-l (`recenter-top-bottom'). + ++++ +** The abbrevs file is now a file named abbrev_defs in +user-emacs-directory; but the old location, ~/.abbrev_defs, is used if +that file exists. + +* Changes in Specialized Modes and Packages in Emacs 23.2 + +** The bookmark menu has a narrowing search via bookmark-bmenu-search. + +** LaTeX mode now provides completion (via completion-at-point). + +** sym-comp.el is now declared obsolete, superceded by completion-at-point. + +** lucid.el and levents.el are now declared obsolete. + +** pcomplete provides a new command `pcomplete-std-completion' which +is similar to `pcomplete' but using the standard completion UI code. + +** Calc ++++ +*** The Calc settings file is now a file named calc.el in +user-emacs-directory; but the old location, ~/.calc.el, is used if +that file exists. + +--- +*** Graphing commands (`g f' etc.) now work on MS-Windows, if you have +the native Windows port of Gnuplot version 3.8 or later installed. + +** Calendar and diary + ++++ +*** Fancy diary display is now the default. +If you prefer the simple display, customize `diary-display-function'. + ++++ +*** The diary's fancy display now enables view-mode. + +--- +*** The command `calendar-current-date' accepts an optional argument +giving an offset from today. + +** Desktop +--- +*** The default value for `desktop-buffers-not-to-save' is nil. +This means Desktop will try restoring all buffers, when you restart +your Emacs session. Also, `desktop-buffers-not-to-save' is only +effective for buffers that have no associated file. If you want to +exempt buffers that do correspond to files, customize the value of +`desktop-files-not-to-save' instead. + +** Dired + +*** The new variable `dired-auto-revert-buffer' allows to revert +dired buffers automatically on revisiting. + +** DocView + +*** When `doc-view-continuous' is non-nil, scrolling a line +on the page edge advances to the next/previous page. + +** GDB-UI + +*** Toolbar functionality for reverse debugging. Display of STL +collections as watch expressions. These features require GDB 7.0 +or later. + +** Grep ++++ +*** A new command `zrgrep' searches recursively in gzipped files. + +** Info + +*** The new command `Info-virtual-index' bound to "I" displays a menu of +matched topics found in the index. + +*** The new command `info-finder' replaces finder.el with a virtual Info +manual that generates an Info file which gives the same information +through a menu structure. + +** Message mode is now the default mode for composing mail. + +The default for `mail-user-agent' is now message-user-agent, so the +C-x m (`compose-mail') command uses Message mode instead of Mail mode. + +Message mode has been included in Emacs, as part of the Gnus package, +for several years. It provides several features that are absent in +Mail mode, such as MIME handling. + +*** If the user has not customized mail-user-agent, `compose-mail' +checks for Mail mode customizations, and issues a warning if these +customizations are found. This alerts users who may otherwise be +unaware that their mail configuration has changed. + +To disable this check, set compose-mail-user-agent-warnings to nil. + +** The default value of mail-interactive is t, since Emacs 23.1. +(This was not announced at the time.) It means that when sending mail, +Emacs will wait for the process sending mail to return. If you +experience delays when sending mail, you may wish to set this to nil. + +** nXML mode is now the default for editing XML files. + +** Shell ++++ +*** ansi-color is now enabled by default. +To disable it, set ansi-color-for-comint-mode to nil. + ++++ +** Tramp + +*** New connection methods "rsyncc", "imap" and "imaps". +On systems which support GVFS-Fuse, Tramp offers also the new +connection methods "dav", "davs", "obex" and "synce". + +** VC and related modes + +*** When using C-x v v or C-x v i on a unregistered file that is in a +directory not controlled by any VCS, ask the user what VC backend to +use to create a repository, create a new repository and register the +file. + +*** FIXME: add info about the new VC functions: vc-root-diff and +vc-root-print-log once they stabilize. + +*** The log functions (C-x v l and C-x v L) do not show the full log +by default anymore. The number of entries shown can be chosen +interactively with a prefix argument, by customizing +vc-log-show-limit. The log buffer display buttons that can be used +to change the number of entries shown. +RCS, SCCS, CVS do not support this feature. + +*** vc-annotate supports annotations through file copies and renames, +it displays the old names for the files and it can show logs/diffs for +the corresponding lines. Currently only Git and Mercurial take +advantage of this feature. + +*** The log command in vc-annotate can display a single log entry +instead of redisplaying the full log. The RCS, CVS and SCCS VC +backends do not support this. + +*** When a file is not found, VC will not try to check it out of RCS anymore. + +*** Diff and log operations can be used from dired buffers. + +*** vc-git changes + +**** The short log format for git makes use of the graph display, so +it's not supported on git versions earlier than 1.5. + +**** Support for operating with stashes has been added to vc-dir: the stash list is +displayed in the *vc-dir* header, stashes can be created, removed, applied and +their content displayed. + +**** vc-dir displays the stash status + +**** vc-dir requires at least git-1.5.5. + +*** vc-bzr supports operating with shelves: the shelve list is +displayed in the *vc-dir* header, shelves can be created, removed and applied. + +*** log-edit-strip-single-file-name controls whether or not single filenames +are stripped when copying text from the ChangeLog to the *VC-Log* buffer. + +** Elint + +--- +*** Elint now uses compilation-mode. + +--- +*** Elint can now scan individual files and whole directories, +and can be run in batch mode. + +--- +*** Elint does a more thorough initialization, and recognizes more built-in +functions and variables. Customize `elint-scan-preloaded' if you want +to sacrifice some accuracy for a faster startup. + +--- +*** Elint attempts some basic understanding of featurep and (f)boundp tests. + +--- +*** Customize `elint-ignored-warnings' to suppress some warnings. + +** Miscellaneous ++++ +*** The new command `async-shell-command' bound globally to `M-&' executes +the command asynchronously without the need to manually add ampersand to +the end of the command. Its output appears in the buffer `*Async Shell +Command*'. + +*** Isearch searches in the comint/shell input history when the new variable +`comint-history-isearch' is non-nil. New commands `comint-history-isearch-backward' +and `comint-history-isearch-backward-regexp' (bound to M-r) start Isearch +in the input history regardless of the value of `comint-history-isearch'. + +*** Interactively `multi-isearch-buffers' and `multi-isearch-buffers-regexp' +read buffer names to search, one by one, ended with RET. With a prefix +argument, they ask for a regexp, and search in buffers whose names match +the specified regexp. Interactively `multi-isearch-files' and +`multi-isearch-files-regexp' read file names to search, one by one, +ended with RET. With a prefix argument, they ask for a wildcard, and +search in file buffers whose file names match the specified wildcard. + ++++ +*** Autorevert Tail mode now works also for remote files. + ++++ +*** The new built-in commands `su' and `sudo' support Tramp. +That means, they change `default-directory' to the new users value, +and let commands run under that user permissions. It works even when +`default-directory' is already remote. Calling the external commands +is possible by `*su' or `*sudo', repectively. + +--- +*** When running in a new enough xterm (newer than version 242), emacs +asks xterm what the background color is and it sets up faces +accordingly for a dark background if needed (the current default is to +consider the background light). + + +* New Modes and Packages in Emacs 23.2 + +** CEDET (the Collection of Emacs Development Tools) is now in Emacs. +This is a collection of packages to aid with using Emacs as an IDE +(integrated development environment): + +*** The Semantic package allows the use of parsers to intelligently +edit and navigate source code. Parsers for C/C++, Java, Javascript, +and several other languages are included by default, and Semantic can +also interface with external tools such as GNU Global and GNU Idutils. + +To enable Semantic, use the global minor mode `semantic-mode'. +See the Semantic manual for details. + +*** EDE (Emacs Development Environment) is a package for managing code +projects, including features such as automatic Makefile generation. + +To enable EDE, use the minor mode `global-ede-mode'. +See the EDE manual for details. + +*** SRecode is a library for recoding Semantic tags back into source +code. It is currently used by some parts of Semantic and EDE; in the +future, it may be used for code generation features. + +*** The EIEIO library implements a subset of the Common Lisp Object +System (CLOS). It is used by the other CEDET packages. + +** mpc.el is a front end for the Music Player Daemon. Run it with M-x mpc. + +** htmlfontify.el turns a fontified Emacs buffer into an HTML page. + +** js.el is a new major mode for JavaScript files. + +** imap-hash.el is a new library to address IMAP mailboxes as hashtables. + + +* Incompatible Lisp Changes in Emacs 23.2 + ++++ +** The Lisp reader turns integers that are too large/small into floats. +For instance, on machines where `536870911' is the largest integer, +reading `536870912' gives the floating-point object `536870912.0'. + +This change only concerns the Lisp reader; it does not affect how +actual integer objects overflow. + +--- +** Several obsolete functions removed. +The functions have been obsolete since Emacs 19, and are unlikely to +be in use: + + time-stamp-month-dd-yyyy, time-stamp-dd/mm/yyyy, time-stamp-mon-dd-yyyy + time-stamp-dd-mon-yy, time-stamp-yy/mm/dd, time-stamp-yyyy/mm/dd, + time-stamp-yyyy-mm-dd, time-stamp-yymmdd, time-stamp-hh:mm:ss, + time-stamp-hhmm, baud-rate + +--- +** Support for generating Emacs 18 compatible bytecode (by setting +the variable `byte-compile-compatibility') has been removed. + +** In image-mode.el `image-mode-maybe' is obsolete. Instead, you can +either use `image-mode' that displays an image file as the actual image +inititally, or `image-mode-as-text' when you want to display an image file +as text inititally. `image-mode-as-text' is a combination of a non-image +mode from `auto-mode-alist' (or Fundamental mode) and `image-minor-mode'. +`image-minor-mode' provides `C-c C-c' key binding to toggle image display. +`image-toggle-display-text' removes image properties. +`image-toggle-display-image' adds image properties. +`image-toggle-display' toggles between `image-mode-as-text' and +`image-mode'. + + +* Lisp changes in Emacs 23.2 + +** make-network-socket can now also create `seqpacket' Unix sockets. + +** New function `completion-in-region' to use the standard completion +facilities on a particular region of text. + ++++ +** The 4th arg to all-completions (aka hide-spaces) is declared obsolete. + +--- +** read-file-name-predicate is obsolete. It was used to pass the predicate +to read-file-name-internal because read-file-name-internal abused its `pred' +argument to pass the current directory, but this hack is not needed +any more. + +** Frame parameter changes + ++++ +*** You can give the `fullscreen' frame parameter the value `maximized'. +This maximizes the frame. + ++++ +*** The new frame parameter `sticky' makes Emacs frames sticky in +virtual desktops. + +--- +** completion-base-size is obsoleted by completion-base-position. +This change causes a few backward incompatibilities, mostly with +choose-completion-string-functions where the `mini-p' argument has +been replaced by a `base-position' argument, and where the `base-size' +argument is now always nil. + +** called-interactively-p now takes one argument and replaces interactive-p +which is now marked obsolete. +** New function set-advertised-calling-convention makes it possible +to obsolete arguments as well as make some arguments mandatory. +** eval-next-after-load is obsolete. +** New hook `after-load-functions' run after loading an Elisp file. + +** You can control which binding is preferentially shown in menus and +docstrings by adding a `:advertised-binding' property to the corresponding +command's symbol. That property can hold a single binding or a list +of bindings. + +** New macro with-silent-modifications to tweak text properties without +affecting the buffer's modification state. +** All the default-FOO variables that hold the default value of the FOO +variable, are now declared obsolete. + +** read-key is a function halfway between read-event and read-key-sequence. +It reads a single key, but obeys input and escape sequence decoding. + +** start-process-shell-command and start-file-process-shell-command +now only take a single `command' argument. + +** The variable `process-file-side-effects' shall be bound to nil, if +a `process-file' call does not change a remote file. By this, file +name handlers like Tramp can apply optimizations. + ++++ +** Hash tables have a new printed representation that is readable. +The feature `hashtable-print-readable' identifies this new +functionality. + +** New functions performing Unicode normalization are added: +ucs-normalize-NFD-region, ucs-normalize-NFD-string, +ucs-normalize-NFC-region, ucs-normalize-NFC-string, +ucs-normalize-NFKD-region, ucs-normalize-NFKD-string, +ucs-normalize-NFKC-region, ucs-normalize-NFKC-string, +ucs-normalize-HFS-NFD-region, ucs-normalize-HFS-NFD-string, +ucs-normalize-HFS-NFC-region, ucs-normalize-HFS-NFC-string. + +** completion-annotate-function specifies how to compute annotations +for completions displayed in *Completions*. + ++++ +** Face aliases can now be marked as obsolete, using the macro +`define-obsolete-face-alias'. + +--- +** Changing the file-names generated by byte-compilation by redefining +the function `byte-compile-dest-file' before loading bytecomp.el is obsolete. +Instead, customize byte-compile-dest-file-function. + +--- +** `byte-compile-warnings' has new members, `constants' and `suspicious'. + +** `delete-directory' has an optional parameter RECURSIVE. + +** New function `copy-directory', which copies a directory recursively. + ++++ +** New function `window-full-height-p', analogous to the full-width version. + + +* Changes in Emacs 23.2 on non-free operating systems + +--- +** On MS-Windows, `display-time' now displays the system load average +as well as the time, as it does on GNU and Unix. + + +* Installation Changes in Emacs 23.1 + +** The default X toolkit is now Gtk+, rather than Lucid. +The configure option `--with-gtk' has been removed. Gtk is now the +default toolkit, but you can use --with-x-toolkit=gtk if necessary. + +** New font code. +Fonts are handled by new code capable of dealing with multiple font +backends. This uses the freetype and fontconfig libraries. + +*** Emacs now accepts font names supplied in the fontconfig format +(e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12"). + +*** Added support for local fonts (fonts installed on the machine +where Emacs is running). + +*** Added support for the Xft library for antialiasing. + +*** Added support for the otf library for complex text layout by +OpenType fonts. + +*** Added support for the m17n library for text shaping. + +** Changes to image support + +*** configure now checks for libgif before libungif when searching for +a GIF library. + +*** Emacs now supports the SVG image format through librsvg2. + +*** Emacs now supports multi-page TIFF images. + +** New NeXTSTEP-based port. +This provides support for GNUstep (via the GNUstep libraries) and Mac +OS X (via the Cocoa libraries). + +Specify --with-ns to configure for this. By default, a self-contained +app will be built (containing all lisp). To install/share lisp with +other emacsen (e.g. X11 build) use --disable-ns-self-contained. See +nextstep/README and nextstep/INSTALL in the Emacs source directory. + +** Mac OS X is no longer supported via Carbon. +Use the NeXTSTEP port, described above. + +** The new configuration option "--with-dbus" enables D-Bus language +bindings for Emacs. + +** Support for many obsolete platforms has been removed. +See the list at the end of etc/MACHINES for details. + +*** Support for systems without alloca has been removed. + +*** Support for Sun windows has been removed. + +*** The `emacstool' utility has been removed. + +** The following platforms will be removed in a future Emacs version: +If you are still using Emacs on one of these platforms, please email +emacs-devel@gnu.org to inform the Emacs developers. + +*** Old GNU/Linux systems based on libc version 5. + +*** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF +executable format. + +*** Solaris versions 2.6 and below. + +*** Solaris on IBM RS6000 machines. + +*** UNIX System V (the original SysV, not later platforms based on it). + +*** Unixware on non-x86 machines. + +*** Platforms not supporting shared libraries (i.e., requiring the +NO_SHARED_LIBS compilation flag). + +** The configure options `--with-gcc', `--without-gcc' have been removed. +Configure will use gcc by default. Set the CC environment variable if +you need control over which C compiler is used. + +** The refcards are now shipped as PDF files. + +** The manuals are now licensed under the GNU Free Documentation License v1.3, +or any later version. + +** Emacs 23 comes with a new set of default icons. +Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png. +The Emacs 22 icon is available as `emacs22.png' in the same location. + +* Changes in Emacs 23.1 + +** Improved X Window System support + +*** Emacs now supports using both X displays and ttys in one session. +With an Emacs server active (M-x server-start), `emacsclient -t' +creates a tty frame connected to the running emacs server. You can +use any number of different ttys. `emacsclient -c' creates a new X11 +frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set). +There may be problems if a display exits unexpectedly and Emacs is compiled +with Gtk+, see etc/PROBLEMS. + +You can test for the presence of this feature in your Lisp code by +testing for the `multi-tty' feature. + +*** Emacs starts in the background, as a daemon, when given the +--daemon command line argument. It disconnects from the terminal and +starts the server. Clients can connect and create graphical or +terminal frames using emacsclient. + +**** emacsclient starts emacs in daemon mode and connects to it when +--alternate-editor="" is used (or when the evironment variable +ALTERNATE_EDITOR is set to "") and emacsclient cannot connect to an +emacs server. + +*** The new command close-display-connection closes a connection to a +remote display. There are some bugs for Gtk+. See etc/PROBLEMS. + +*** Emacs now supports the XEmbed specification. +You can embed Emacs in another application on X11. The new command line +option --parent-id is used to pass the parent window id to Emacs. See +http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html +for details about XEmbed. + +*** Emacs can now set the frame opacity. +The opacity of a frame can be controlled by setting the `alpha' frame +parameter. This only takes effect on a compositing window manager for +the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac +OS X, or on Windows 2000 and later versions of Windows. + +The alpha parameter should be an integer between 0 (transparent) and +100 (opaque), or a float number between 0.0 and 1.0. It can also be a +cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an +active frame and INACTIVE is the opacity of non-active frames. + +The variable `frame-alpha-lower-limit' defines a lower bound for the +opacity; the default is 20. + +** Internationalization changes + +*** 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' (`emacs-internal' is an alias +for this). This encoding is backward-compatible with Unicode's UTF-8 +encoding. The internal encoding previously used by Emacs, +`emacs-mule', is still available for reading and writing files. + +During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files. +As a result, byte-compiled files containing non-ASCII characters can't +be read by earlier versions of Emacs. Files compiled by Emacs 20, 21, +or 22 are loaded correctly as `emacs-mule' (whether or not they +contain multibyte characters). This takes somewhat more time, so it +may be worth recompiling existing .elc files which don't need to be +shared with older Emacsen. + +*** There are new coding systems/aliases; see M-x list-coding-systems. + +*** There is a new charset implementation with many new charsets. +See M-x list-character-sets. New charsets can be defined conveniently +as tables of unicodes. + +*** There are new language environments for Chinese-GBK, +Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu, +Sinhala, and TaiViet. + +*** The minor modes unify-8859-on-encoding-mode and +unify-8859-on-decoding-mode are obsolete. + +*** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers +accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for +decimal). It also accepts Unicode character names with completion. + +*** The `cyrillic-translit' input method supports many new characters. +Common typographical characters available from Unicode were added to +`cyrillic-translit': punctuation marks, accented characters, fractions, +and others. + +** Emacs now supports serial port access on GNU/Linux, Unix, and +Windows. The new command `serial-term' starts an interactive terminal +on a serial port. The serial port can be configured at runtime with +the mode-line mouse menu. + +** Menu Bar changes + +*** In the Options menu, the "Set Default Font" item applies the +selected font to the `default' face on all frames, not just the +current frame. Furthermore, if Emacs is compiled with both GTK and +Fontconfig support, the "Set Default Font" item uses the GTK font +selection dialog instead of an Emacs pop-up menu. + +*** The font setting chosen by "Set Default Font" is saved if the +"Save Options" item is used. + +*** The Tools menu contains a new Encryption/Decryption submenu. +This contains commands provided by EasyPG, the newly-included +interface to GnuPG (see New Modes and Packages). + +*** In the Options menu, the "Truncate Long Lines in the Buffer" entry +has been replaced with a submenu offering three different ways to +handle long lines: truncation, continuation at the window edge, and +the new word wrapping behavior (see Editing Changes, below). + +*** Improvements to menus for major and minor modes +More major and minor modes now have a mode specific menu, and existing +mode menus have been improved to include more functionality. + +** Mode-line changes + +*** The mode-line displays a `@', instead of `-', if the +default-directory for the current buffer is on a remote machine. + +*** The mode-line displays a mode menu when mouse-1 is clicked on a +minor mode, in the same way as it already did for major modes. + +*** The `mode-line-emphasis' face is used to highlight certain +mode-line information (e.g. waiting for a VC command to finish). + +*** The mode-line tooltips have been improved to provide more details. + +*** The VC, line/colum number and minor mode indicators on the mode +line are now interactive: mouse-1 can be used on them to pop up a menu. + +** File deletion can make use of the Recycle Bin or system Trash folder. +Set `delete-by-moving-to-trash' non-nil to use this. Deleted files +and directories will then be sent to the Recycle Bin on Windows, and +to `trash-directory' on other systems. + +** Directory-local variables can now be defined. +By default, Emacs looks in .dir-locals.el for directory-local +variables. For more information, see `dir-locals-set-directory-class' +and `dir-locals-set-class-variables'. + +** Emacs can now use `auth-source' for authentication. +`smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain +login names and passwords. The match, if found, is reported +in *Messages* with the password blanked out. + +** `where-is-preferred-modifier' can specify your favorite modifier. + + +* Startup Changes in Emacs 23.1 + +** The option `inhibit-startup-screen' (with aliases to old names +`inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit +display of the initial message in the *scratch* buffer. If you don't +want to display the initial message in the *scratch* buffer at startup, +you can set the option `initial-scratch-message' to nil. + +** New user option `initial-buffer-choice' specifies what to display +after starting Emacs: startup screen, *scratch* buffer, visiting a +file or directory. + +** New alias `argv' for `command-line-args-left' +This is a convenience alias, so that one can write `(pop argv)' +inside of --eval command line arguments in order to access +following arguments. + +** The abbrev file is no longer read at startup in batch mode. + +** Emacs now supports invocation by an X session manager. +It can save a session and restore it later. See the documentation of +the functions `emacs-session-save' and `emacs-session-restore'. +(Actually, this feature was introduced with Emacs 22, but it was not +documented.) + +* Incompatible Editing Changes in Emacs 23.1 + +** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&' +on the regexp command prefix map. + +** In Dired-x, all command guesses for ! are now added to the default +list accessible by M-n instead of pushing all guesses temporarily into +the history list. + +** In Isearch mode, a special case of typing `C-w' at the beginning of +the minibuffer that toggles word search (i.e. using key sequences +`C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key +`M-s w' to start word search, or type `M-s w' in Isearch mode to +toggle word search. To start nonincremental word search you can now use +`M-s w RET' and `M-s w C-r RET' instead of `C-s RET C-w' and `C-r RET C-w'. + +** In Info, `Info-search' is unbound from `M-s' to allow using `M-s w' +for word search as well as other search commands from the global prefix +key `M-s'. `Info-search' is still bound to `s', and also incremental +search commands `C-s', `C-M-s', `C-r', `C-M-r' are available for searching +through multiple Info nodes, together with their nonincremental versions +`C-s RET', `C-r RET', `C-M-s RET', `C-M-r RET', `M-s w RET'. + +** In Text mode, `center-line' and `center-paragraph' are rebound from +`M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the global +prefix map `M-o', which is intended for such formatting commands. + +** The following input methods were removed in Emacs 22.2, but this was +not advertised: danish-alt-postfix, esperanto-alt-postfix, +finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix, +norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix, +and swedish-alt-postfix. Use the versions without "alt-", which are +identical. + + +* Editing Changes in Emacs 23.1 + +** The C-n and C-p line-motion commands now move by screen lines, +taking continued lines and variable-width characters into account. +Setting `line-move-visual' to nil reverts this to the previous +behavior (i.e., motion by logical lines based on buffer contents +alone). + +** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now +invokes `suspend-frame'. These changes are for compatibility with the +new multi-tty support (see `Improved X Window System support' above). + +** Mark changes + +*** Transient Mark mode is now on by default. + +*** mark-even-if-inactive now defaults to t + +*** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without +activating it. + +*** When Transient Mark mode is on, M-q now fills the region if the +region is active. Otherwise, it fills the current paragraph. + +*** When Transient Mark mode is on, M-$ now checks spelling of the +region if the region is active. Otherwise, it checks spelling of the +word at point. + +*** When Transient Mark mode is on, TAB now indents the region if the +region is active. + +*** The variable `use-empty-active-region' controls whether an empty +active region in Transient Mark mode should make commands operate on +that empty region. + +** Temporarily active regions + +*** The new variable shift-select-mode, non-nil by default, controls +shift-selection. When Shift Select mode is on, shift-translated +motion keys (e.g. S-left and S-down) activate and extend a temporary +region, similar to mouse-selection. + +*** Temporarily active regions, created using shift-selection or +mouse-selection, are not necessarily deactivated in the next command. +They are only deactivated after point motion commands that are not +shift-translated, or after commands that would ordinarily deactivate +the mark in Transient Mark mode (e.g., any command that modifies the +buffer). + +** Minibuffer and completion changes + +*** Emacs may ask for confirmation before opening a non-existent file +or buffer. By default, Emacs requests confirmation if you type RET +immediately after TAB, and the resulting input is not an existing file +or buffer; this usually happens when the minibuffer input did not +complete far enough and you entered RET by mistake. In that case, +Emacs puts the message "[Confirm]" in the minibuffer; type RET again +to create the file or buffer. + +The new variable confirm-nonexistent-file-or-buffer determines whether +Emacs asks for confirmation. The default value is `after-completion'. +If you change it to t, Emacs always asks for confirmation; if you +change it to nil, Emacs never asks for confirmation. + +*** The rules for performing completion have been changed. +When generating completion alternatives, Emacs now takes the +minibuffer text after point, if any, into account: this text is +treated as a substring of the remaining part of the completion +alternative (i.e., the part not matched by the minibuffer text before +point). If no completion alternatives are found this way, Emacs +attempts to perform partial-completion. If still no completion +alternatives are found, we fall back on the Emacs 22 rules for +performing completion. + +The new variable `completion-styles' can be customized to choose your +favorite completion style. + +*** When M-n in the minibuffer reaches the end of the list of defaults, +it adds the completion list to the end, so next M-n continues putting +completion items to the minibuffer. The same principle applies to +incremental search commands as well: C-s or C-M-s starts searching +the default values and after the end of defaults they continue +searching minibuffer completion items. + +*** Minibuffer input of shell commands now comes with completion. + +*** In the `C-x d' (Dired) prompt, typing M-n gives the visited file +name of the current buffer. + +*** In the M-! (shell-command) prompt, M-n provides some default commands. +These are guessed using the file extension of the current file, based +on the file-handlers specified in the operating system's `mailcap' +file. The ! command in Dired (dired-do-shell-command) works +similarly, using the file displayed on the current line. + +*** A list of regexp default values is available via M-n for `occur', +`keep-lines', `flush-lines' and `how-many'. This list includes the active +region in transient-mark-mode, the word under the cursor, the last Isearch +regexp, the last Isearch string and the last replacement regexp. + +*** When enable-recursive-minibuffers is non-nil, operations which use +switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when +used in a minibuffer or a dedicated window. Instead, they fallback on +using pop-to-buffer, which will use some other window. This change +has no effect when enable-recursive-minibuffers is nil (the default). + +*** Isearch started in the minibuffer searches in the minibuffer history. +Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer +history elements, and forward Isearch commands (C-s, C-M-s) search in +next history elements. When the reverse search reaches the first history +element, it wraps to the last history element, and the forward search +wraps to the first history element. When the search is terminated, the +history element containing the search string becomes the current. + +*** The variable read-file-name-completion-ignore-case overrides +completion-ignore-case for file name completion. + +*** The variable read-buffer-completion-ignore-case overrides +completion-ignore-case for buffer name completion. + +*** The new command `minibuffer-force-complete' chooses one of the +possible completions, rather than stopping at the common prefix. + +*** If `completion-auto-help' is `lazy', Emacs shows the completions +buffer only on the second attempt to complete. This was already +supported in `partial-completion-mode'. + +** Face changes + +*** S-down-mouse-1 now pops up a menu for changing the font and text +size of the default face in the current buffer. The face is changed +via face remapping (see Lisp changes, below). + +*** New commands to change the default face size in the current buffer. +To increase it, type `C-x C-+' or `C-x C-='. To decrease it, type +`C-x C--'. To restore the default (global) face size, type `C-x C-0'. +These work via Text Scale mode, a new minor mode. + +The final key in the above commands may be repeated without the +leading `C-x', e.g. `C-x C-= C-= C-=' increases the face height by +three steps. Each step scales the height of the default face by the +value of the variable `text-scale-mode-step'. + +*** The commands buffer-face-mode and buffer-face-set can be used to +remap the default face in the current buffer. See "Buffer Face mode", +under New Modes and Packages. + +** Primary selection changes + +*** You can disable kill ring commands from accessing the primary +selection by setting `x-select-enable-primary' to nil. + +** Continuation lines can now be wrapped at word boundaries +(word-wrapping). This is controlled by the new per-buffer variable +`word-wrap'. Word wrapping does not take place if continuation lines +are not shown, e.g. if truncate-lines is non-nil. The most convenient +way to enable word-wrapping is using the new minor mode Visual Line +mode; in addition to setting `word-wrap' to t, this rebinds some +editing commands to work on screen lines rather than text lines. See +New Modes and Packages, below. + +** Window management changes + +*** truncate-partial-width-windows now accepts integer values, which +specify a minimum window width for partial-width windows, below which +lines are truncated. The default has been changed to 50. + +*** The new command balance-windows-area balances windows both +vertically and horizontally. + +*** pop-to-buffer now always sets input focus when the popped-to window +is on a different frame. + +** Miscellaneous changes: + +*** C-l is bound to the new command recenter-top-bottom, rather than recenter. +This moves the current line to window center, top and bottom on +successive invocations. + +*** scroll-preserve-screen-position also preserves the column position. + +*** If `yank-pop-change-selection' is t, rotating the kill ring also +updates the selection or clipboard to the current yank, just as M-w +would do so with the text it copies to the kill ring. + +*** C-M-% now shows replacement as it would look in the buffer, with +`\N' and `\&' substituted according to the match. Old behavior can be +restored by customizing `query-replace-show-replacement'. + +*** The command shell prompts for the default directory, when it is +called with a prefix and the default directory is a remote file name. +This is because some file name handlers (like ange-ftp) are not able to +run processes remotely. + +*** The new command kill-matching-buffers kills buffers whose name +matches a regexp. + +*** The value of comment-style now defaults to `indent'. +Thefore, comment-start markers are inserted at the current indentation +of the region to comment, rather than the leftmost column. + +*** The new commands `pp-macroexpand-expression' and +`pp-macroexpand-last-sexp' pretty-print macro expansions. + +*** The new command `set-file-modes' allows to set file's mode bits. +The mode bits can be specified in symbolic notation, like with GNU +Coreutils, in addition to an octal number. `chmod' is a new +convenience alias for this function. + +*** `next-error-recenter' specifies how next-error should recenter the +visited source file. Its value can be a number (for example, 0 for +top line, -1 for bottom line), or nil for no recentering. + +*** When typing in a password in the echo area, C-y yanks the current +kill into the password. + +*** Tooltip frame parameters `font' and `color' in `tooltip-frame-parameters' +are ignored. Customize the `tooltip' face instead. + +*** `mkdir' is a new convenience alias for `make-directory'. + +* New Modes and Packages in Emacs 23.1 + +** Auto Composition Mode is a minor mode that composes characters +automatically when they are displayed. It is globally on by default. +It uses `auto-composition-function' (default `auto-compose-chars'). + +** Bubbles, a new game, is similar to SameGame. + +** Buffer Face mode is a minor mode for remapping the default face in +the current buffer. The variable `buffer-face-mode-face' specifies +the face to remap to. The command `buffer-face-set' prompts for a +face name, sets `buffer-face-mode-face' to it, and enables +buffer-face-mode. See "Face changes", under Editing Changes, for a +description of face remapping. + +** butterfly flips the desired bit on the drive platter. +See http://xkcd.com/378/ + +** bug-reference.el provides clickable links to bug reports. + +** dbus.el provides D-Bus language bindings. +D-Bus is an inter-process communication mechanism for applications +residing on the same host. See the manual for details. + +** DocView mode allows viewing of PDF, PostScript and DVI documents. +One can also search for a regular expression in the document. For +details, see the commentary in doc-view.el. + +PDF and DVI files are now opened in Doc View mode by default. + +In Postcript mode, C-c C-c launches Doc View minor mode for viewing +the postscript file. + +** EasyPG provides an interface to the GNU Privacy Guard (GnuPG). +It includes a GnuPG keyring browser, cryptographic operations on +regions and files, and automatic encryption of *.gpg files. For +details, see the EasyPG Assistant User's Manual. + +** json.el is a library for parsing and generating JSON +(JavaScript Object Notation), a lightweight data-interchange format. + +** linum.el is a new minor mode to display line numbers for the +current buffer. + +** mairix.el is an interface to mairix, a free tool for indexing and +searching locally stored mail. It allows you to query mairix and +display the search results with Rmail, Gnus and VM. Note that there +is an existing Gnus back end, nnmairix.el, which should be used with +Maildir/MH setups. + +** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt. + +** nXML Mode +This is a new mode for editing XML documents. It allows a schema to +be associated with the XML document being edited, using Relax NG as +the schema language. The schema is used to provide two key features: + +*** Continuous validation. nXML validates as you type, highlighting +any invalid parts of your document. + +*** Completion. nXML can assist you in entering an element name, +attribute name or data value by using information about what is +allowed by the schema in that context. + +** proced.el provides a Dired-like interface for operating on +processes. Proced makes an Emacs buffer containing a listing of the +current processes. You can use the normal Emacs commands to move +around in this buffer, and special Proced commands to operate on the +processes listed. It is currently only functional on GNU/Linux, +MS-Windows and Solaris. + +** Remember Mode is a mode for jotting down things to remember. +Notes can be saved to a Diary file. For details, see the Remember +Manual. + +** RST mode is a major mode for editing reStructuredText files. + +** Ruby mode is a major mode for Ruby files. + +** Visual Line mode provides support for editing by visual lines. +It turns on word-wrapping in the current buffer, and rebinds C-a, C-e, +and C-k to commands that operate by visual lines instead of logical +lines. This is a more reliable replacement for longlines-mode. +This can also be turned on using the menu bar, via +Options -> Line Wrapping in this Buffer -> Word Wrap + +** xesam.el is an implementation of Xesam, an interface to (desktop) +search engines like Beagle, Strigi, and Tracker. The Xesam API +requires D-Bus for communication. + +** zeroconf.el offers service discovery and service publishing +interfaces according to the zeroconf specification. It communicates +with Avahi, a zeroconf implementation, via D-Bus messages on systems +which have installed this software. + +** There is a new `whitespace' package. +(The pre-existing one has been renamed to `old-whitespace'.) +Now, besides reporting bogus blanks, the whitespace package has a +minor mode and a global minor mode to visualize blanks (TAB, (HARD) +SPACE and NEWLINE). The visualization is made via faces and/or display +table. It can also indicate lines that extend beyond a given column, +trailing blanks, and empty lines at the start or end of a buffer. +See `whitespace-style' for more details. The `whitespace-action' option +specifies what to do when a buffer is visited, killed, or written. + + +* Changes in Specialized Modes and Packages in Emacs 23.1 + +** Abbrev has been rewritten in Elisp and extended with more flexibility. + +*** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put, +abbrev-table-p, abbrev-insert, abbrev-table-menu. + +*** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'. + +*** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take +extra arguments for arbitrary properties. + +*** New variable `abbrev-minor-mode-table-alist'. + +*** `local-abbrev-table' can hold a list of abbrev-tables. + +*** Abbrevs have now the following special properties: +`:count', `:system', `:enable-function', `:case-fixed'. + +*** Abbrev-tables have now the following special properties: +`:parents', `:case-fixed', `:enable-function', `:regexp', +`abbrev-table-modiff'. + +** Apropos + +*** `apropos-library' describes the elements defined in a given library. + +*** Set `apropos-compact-layout' is you want a more compact (but wider) layout. + +** Archive Mode has basic support to browse Rar archives. +Note, however, that the free version of the unrar command only handles +versions 1 and 2 of the Rar format. + +** BibTeX mode + +*** New command `bibtex-initialize' (re)initializes BibTeX buffers. + +*** New `bibtex-entry-format' options `whitespace', `braces', and +`string', disabled by default. + +*** New variable `bibtex-cite-matcher-alist' contains rules to +identify cited keys in BibTeX entries, used by `bibtex-find-crossref'. + +*** Command `bibtex-url' allows multiple URLs per entry. + +** Bookmarks + +*** bookmark.el saves bookmarks in a pre-Emacs-23-incompatible file format +bookmark.el can read a .emacs.bmk file saved by an older Emacs, but an +older Emacs cannot read one saved by Emacs 23. + +** Calendar and diary + +*** There is a new date style, `iso', essentially year/month/day. +The variable `european-calendar-style' is obsolete - use `calendar-date-style'. +Similarly, the commands `american-calendar' and `european-calendar' +should be replaced by `calendar-set-date-style'. + +*** The calendar namespace has been rationalized. +All functions and variables now begin with a `calendar-', `diary-', or +`holiday-' prefix. The various calendar systems have secondary +prefixes, eg `calendar-french-'. The old names you are likely to use +directly still exist, for the time being, as aliases, but please start +using the new names. + +*** The whitespace in the calendar layout can be customized. +See the variables: +calendar-left-margin, calendar-intermonth-spacing, calendar-column-width, +calendar-day-header-width, and calendar-day-digit-width. + +*** Text (e.g. ISO weeks) can be displayed between the calendar months. +See the variables calendar-intermonth-header and calendar-intermonth-text. + +*** The function `holiday-chinese' computes holidays on the Chinese calendar. +It has been used to add items to the list `holiday-oriental-holidays'. + +*** `diary-remind' accepts a negative number -DAYS as a shorthand for +the list (1 2 ... DAYS). + +** Change Log mode + +*** The new command C-c C-f (change-log-find-file) finds the file +associated with the current log entry. + +*** The new command C-c C-c (change-log-goto-source) goes to the +source code associated with a log entry. + +** Compile and grep modes + +*** The mode-line entry for the *compilation* and *grep* buffer is color coded. +It has different colors for to show that: (a) the command is still +running, (b) successful completion, (c) error. + +*** compilation-auto-jump-to-first-error tells `compile' to jump to +the first error encountered during compilations. + +*** compilation-scroll-output accepts a new value, `first-error', which +says to stop auto scrolling at the first error that occurs. + +*** The `cc' alias for C++ files in `grep-file-aliases' has been +improved. `hh' can be used to match C++ header files and `cchh' both +C++ sources and headers. + +** Copyright + +*** You can specify your copyright holders' names. +Only copyright lines with holders matching `copyright-names-regexp' are +considered for update. + +*** Copyrights can be at the end of the buffer. +This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode). + +** Custom + +*** defcustom accepts new keyword arguments, `:safe' and `:risky', which +set a variable's `safe-local-variable' and `risky-local-variable' property. + +** Diff mode + +*** diff-refine-hunk highlights word-level details of changes in a diff hunk. +It's used automatically as you move through hunks, see +diff-auto-refine-mode. It is bound to `C-c C-b'. + +*** diff-add-change-log-entries-other-window iterates through the diff +buffer and tries to create ChangeLog entries for each change. +It is bound to `C-x 4 A'. + +*** Turning on `whitespace-mode' in a diff buffer will show trailing +whitespace problems in the modified lines. + +** Dired + +*** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode, +and C-x C-q in wdired-mode exits it with asking a question about +saving changes. + +*** `&' runs the command `dired-do-async-shell-command' that executes +the command asynchronously without the need to manually add ampersand +to the end of the command. Its output appears in the buffer `*Async Shell +Command*'. + +*** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names. +When a new user option `dired-isearch-filenames' is t, then even ordinary +Isearch started with `C-s' and `C-M-s' matches only at file names in the +Dired buffer. When `dired-isearch-filenames' is `dwim' then activation of +file name Isearch depends on the position of point - if point is on a file +name initially, then Isearch matches only file names, otherwise it matches +everywhere in the Dired buffer. You can toggle file names matching on or +off by typing `M-s f' in Isearch mode. + +*** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files. +They visit the first marked file in the sequence and display the usual Isearch +prompt for a string or a regexp where all Isearch commands are available. + +*** `Q' in Dired provides two new keys for multi-file replacement. +The upper case key `Y' replaces all remaining matches in all remaining files +with no more questions. The upper case key `N' stops doing replacements +in the current file and skips to the next file. These multi-file keys +are available for all commands that use `tags-query-replace' +including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp', +`reftex-query-replace-document'. + +** Fortran + +*** The line length of fixed-form Fortran is not fixed at 72 any more. +Customize the variable `fortran-line-length' to change it. + +*** In Fortran mode, M-; is now bound to the standard comment-dwim, +rather than fortran-indent-comment. + +*** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax. + +** Gnus + +*** The Gnus package has been updated +There are many news features, bug fixes and improvements; see the file +GNUS-NEWS or the node "No Gnus" in the Gnus manual for details. + +*** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for +saving articles drafts and ~/.newsrc.eld. These file may not be read +correctly in Emacs 22 and below. If you want to Gnus across different Emacs +versions, you may set `mm-auto-save-coding-system' to `emacs-mule'. + +*** Passwords are consistently loaded through `auth-source' +Gnus can use `auth-source' for POP and IMAP passwords. Also see that +`smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS +authentication respectively. + +** Help mode + +*** New macro `with-help-window' should set up help windows better +than `with-output-to-temp-buffer' with `print-help-return-message'. + +*** New option `help-window-select' permits to customize whether help +window shall be automatically selected when invoking help. + +*** New variable `help-window-point-marker' permits one to specify a new +position for point in help window (for example in `view-lossage'). + +** Isearch + +*** New command `isearch-forward-word' bound globally to `M-s w' starts +incremental word search. New command `isearch-toggle-word' bound to the +same key `M-s w' in Isearch mode toggles word searching on or off +while Isearch is active. + +*** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch +mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current +search string as its regexp argument. The same key `M-s h r' and +other keys on the `M-s h' prefix are bound globally to the command +`highlight-regexp' and other hi-lock commands. + +*** New command `isearch-occur' bound to `M-s o' in Isearch mode +runs `occur' with the current search string. The same key `M-s o' +is bound globally to the command `occur'. + +*** Isearch can now search through multiple ChangeLog files. +When running Isearch in a ChangeLog file, if the search fails, +then another C-s tries searching the previous ChangeLog, +if there is one (e.g. going from ChangeLog to ChangeLog.12). +This is enabled if multi-isearch-search is non-nil. + +*** Two new commands to start Isearch on a list of marked buffers +for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and +`M-s a M-C-s'. + +*** The part of an Isearch that failed to match is highlighted in +`isearch-fail' face. + +*** `C-h C-h' in Isearch mode displays isearch-specific Help screen, +`C-h b' displays all Isearch key bindings, `C-h k' displays the full +documentation of the given Isearch key sequence, `C-h m' displays +documentation of Isearch mode. All the rest Help commands exit Isearch mode +and execute their global definitions. + +*** When started in the minibuffer, Isearch searches in the minibuffer +history. See `Minibuffer changes', above. + +** MH-E + +*** Upgraded to MH-E version 8.2. See MH-E-NEWS for details. + +** Python +*** The file etc/emacs.py now supports both Python 2 and 3, meaning +that either version can be used as inferior Python by python.el. + +*** Python mode now has `pdbtrack' functionality. When using pdb to +debug a Python program, pdbtrack notices the pdb prompt and displays +the source file and line that the program is stopped at, much the same +way as gud-mode does for debugging C programs with gdb. + +** Recentf + +*** The default value of `recentf-keep' prevents from checking of +remote files, if there is no established connection to the +corresponding remote host. + +** Rmail + +*** Rmail no longer converts the messages to Babyl format. +Instead, it uses UNIX mbox format, both on disk and in Rmail buffers, +and does conversion and decoding when a message is displayed. + +The first time you visit an Rmail file in Babyl format, Rmail +automatically converts it to mbox format. This is a one-time +conversion, but it can take a few minutes, depending on how fast is +your machine and on the size of the file. You should find the rest of +Rmail usage unaltered. + +However, M-x set-rmail-inbox-list now lasts only for one session +because there is no way to save the list of inbox files in an +mbox-format file. + +Also, whereas with Babyl format M-x find-file would switch to Rmail +mode, with mbox format this is no longer the case (there being no way +to add an "-*- rmail-*-" cookie to an mbox file). Use C-u M-x rmail +instead. + +If you have written any extensions to Rmail, they are likely to need +updating. Conceptually, the Rmail buffer that you see is no longer +just a narrowed portion of the whole. So you cannot access the whole +of a message (or message collection) by a simple save-restriction and +widen. Instead, there are two buffers: the rmail-buffer, and the +rmail-view-buffer. The former is the buffer that you see, the latter +is invisible. Most of the time, the invisible `view' buffer contains +the full contents of the Rmail file, and the Rmail buffer contains a +decoded copy of the current message (with only a subset of the +headers). In this state, Rmail is said to be `swapped'. + +You may find the following functions useful: + +`rmail-get-header' and `rmail-set-header' get or set the value of a +message header, whether or not it is currently visible. + +`rmail-apply-in-message' is a general purpose function that calls a +function (with arguments) which you specify on the full text of a given +message. To further narrow to just the headers, search forward for "\n\n". + +*** The new command `rmail-mime' displays MIME messages. +It is bound to `v' in Rmail buffers and summaries. It displays plain +text and multipart messages in a temporary buffer, and offers buttons +to save attachments. + +*** The command `rmail-redecode-body' no longer accepts the optional arg RAW. +Since Rmail now holds messages in their original undecoded form in a +separate buffer, `rmail-redecode-body' no longer encodes the original +message, and therefore there should be no need to avoid encoding it. + +*** The o command is now `rmail-output'. It is an all-purpose command +for copying messages from Rmail and appending them to files. It +handles Babyl-format files as well as mbox-format files, and it +handles both kinds properly when they are visited in Emacs. It always +copies the full headers of the message. + +*** The C-o command is now `rmail-output-as-seen'. It uses +the message as displayed, appending it to an mbox file. + +*** The modified status of the Rmail buffer is reported in the mode-line. +Previously, this information was hidden. + +** TeX modes + +*** New option latex-indent-within-escaped-parens +permits to customize indentation of LaTeX environments delimited +by escaped parens. + +** T-mouse Mode + +*** If the gpm mouse server is running and t-mouse-mode is enabled, +Emacs uses a Unix socket in a GNU/Linux console to talk to server, +rather than faking events using the client program mev. This C level +approach provides mouse highlighting and help echoing in the +minibuffer. + +** Tramp + +*** New connection methods. +The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have +been introduced. There are also new so-called gateway methods +"tunnel" and "socks". + +*** IPv6 addresses. +IPv6 addresses are supported now as host names. They must be embedded +in square brackets, like in "/ssh:[::1]:". + +*** Multihop syntax has been removed. +The pseudo-method "multi" has been removed. Instead, multi hops +can be specified by the new variable `tramp-default-proxies-alist'. + +*** More default settings. +Default values can be set via the variables `tramp-default-user', +`tramp-default-user-alist' and `tramp-default-host'. + +*** Connection information is cached. +In order to reduce connection setup, information about used +connections is kept persistently in a file. The name of this file is +defined in the variable `tramp-persistency-file-name'. + +*** Control of remote processes. +Running processes on a remote host can be controlled by settings in +`tramp-remote-path' and `tramp-remote-process-environment'. + +*** Success of remote copy is checked. +When the variable `file-precious-flag' is set, the success of a remote +file copy is checked via the file's checksum. + +*** Passwords can be read from an authentification file. +Tramp uses the package `auth-source' to read passwords from a file, if +necessary. + +** VC and related modes + +*** VC now supports applying VC operations to a set of files at a time. +This enables VC to work much more effectively with changeset-oriented +version-control systems such as Subversion, GNU Arch, Mercurial, Git +and Bzr. VC will now pass a multiple-file commit to these systems as +a single changeset. + +*** vc-dir is a new command that displays file names and their VC +status. It allows to apply various VC operations to a file, a +directory or a set of files/directories. + +*** VC switches are no longer appended, rather the first non-nil value is used. +(This was for the most part true in Emacs 22, but was not advertised). +This is because there is an increasing variety of VC systems, and they +do not all accept the same "common" options. For example, a CVS diff +command used to append the values of `vc-cvs-diff-switches', +`vc-diff-switches', and `diff-switches'. Now the first non-nil value +from that sequence is used. The special value `t' means "no switches". + +*** Clicking on the VC mode-line entry now pops the VC menu. + +*** The VC mode-line entry now has a tooltip that explains the VC file status. + +*** In VC Annotate mode, the key bindings have changed to use lower +case keys instead of the upper case keys used in the past. + +*** In VC Annotate mode, for VC systems that support changesets, you can +see the diff for the whole changeset (not only for the current file) +by typing the D key. Using the "Show changeset diff of revision at +line" menu entry does the same thing. + +*** In VC Annotate mode, you can type v to toggle the annotation visibility. + +*** In VC Annotate mode, you can type f to show the file revision on +the current line. + +*** Asynchronous VC commands display [Waiting...] in the mode-line +of the corresponding buffer as long as the asynchronous process is +active. + +*** Log entries can be modified using the key "e" in log-view. +For now only CVS, RCS, SCCS and SVN support this functionality. +This is done by the `modify-change-comment' backend function. + +*** In log-view-mode, for VC systems that support changesets, you can +see the diff for the whole changeset (not only for the current file) +by typing the D key or using the "Changeset Diff" menu entry. + +*** In Log Edit mode, C-c C-d now shows the diff for the files involved. + +*** vc-git supports the "git grep" command. + +*** VC Support for Meta-CVS has been removed for lack of a maintainer able +to update it to the new VC. + +** Miscellaneous + +*** comint-mode uses `start-file-process' now (see Lisp Changes). +If `default-directory' is a remote file name, subprocesses are started +on the corresponding remote system. + +*** Eldoc highlights the function argument under point +with the face `eldoc-highlight-function-argument'. + +*** In Etags, the --members option is now the default. +Use --no-members if you want the old default behavior of not tagging +struct members in C, members variables in C++ and variables in PHP. + +*** The `gdb' command only works with the graphical interface now. +Use `gud-gdb' if you want the (old) text command mode. + +*** goto-address.el provides two new minor modes, goto-address-mode and +goto-address-prog-mode, which buttonize URLS and email addresses. + +*** The new command `eshell/info' runs info in an eshell buffer. + +*** The new variable `ffap-rfc-directories' specifies a list of local +directories in which `ffap-rfc' will first search for RFCs. + +*** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them. +See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'. + +*** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'. + +*** Info displays breadcrumbs in the header of the page. +See Info-breadcrumbs-depth to control it. + +*** net-utils has an `iwconfig' command, similar to the existing `ifconfig'. +It is used to configure wireless interfaces. + +*** The pcmpl-unix package supports hostname completion for ssh and scp. + +*** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs. + +*** smerge-refine highlights word-level details of changes in conflict. +It's used automatically as you move through conflicts, see +smerge-auto-refine-mode. + +*** talk.el has been extended for multiple tty support. + +*** A new command `display-time-world' has been added to the Time +package. It creates a buffer with an updating time display using +several time zones. + +*** The appearance of superscript and subscript in TeX is more customizable. +See the documentation of the variables: tex-fontify-script, +tex-font-script-display, tex-suscript-height-ratio, and +tex-suscript-height-minimum. + +*** view-remove-frame-by-deleting is now by default t +since users found iconification of view-mode frames distracting. + +*** WoMan tries to add locale-specific manual page directories to the +search path. This can be disabled by setting `woman-locale' to nil. + + +* Changes in Emacs 23.1 on non-free operating systems + +** Case is now considered significant in completion on MS-Windows. +The default value of `completion-ignore-case' is now nil on +MS-Windows, the same as it is for other operating systems. The +variable doesn't apply to reading a file name -- in that case Emacs +heeds `read-file-name-completion-ignore-case' instead. + +** IPv6 is supported on MS-Windows. +Emacs now supports IPv6 on Windows XP and later, and earlier versions +of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was +supported on other platforms, but not on Windows due to using the winsock +1.1 header file, even though Emacs was linking to the winsock 2 library. + +** Busy cursor (hourglass) now displays on MS-Windows. +When Emacs is busy, an hourglass mouse cursor is displayed on Windows. +In Emacs 22 only X supported the busy cursor. + +** Battery status is available on MS-Windows +Emacs can now display the battery status in the mode-line when enabled with +display-battery-mode or from the Options menu. More verbose battery +information is also available with the command `battery'. In Emacs 22 +battery status was supported only on GNU/Linux and Mac. + +** More keys available on MS-Windows. +Keys normally associated with IMEs, and some exotic keys not normally found +on standard keyboards have been given names so they can be bound to functions +inside Emacs. If there are keys on your keyboard that have not been exposed +to Emacs in the past, try C-h k to see if they are available now. + +Emacs can now bind functions to the extra buttons for media player and +browser control present on some keyboards. These buttons are disabled +by default, since enabling them prevents their system-wide use when +Emacs has focus. To enable them, set the variable +w32-pass-multimedia-buttons to nil. See the doc string of that variable +for the list of extra keys that are available. + +** BDF fonts no longer supported on MS-Windows. +The font backend was completely rewritten for this release. The focus +on Windows has been getting acceptable performance and full unicode +support, including complex script shaping for native Windows fonts. A +rewrite of the BDF font support has not happened due to lack of time +and developers. If demand still exists for such a backend even with +the improved language support for native Windows fonts, future +development in this direction will most likely be based on the +freetype library, giving access to a wider range of font formats. + + +* Incompatible Lisp Changes in Emacs 23.1 + +** Variables cannot be both buffer-local and frame-local any more. + +** `functionp' returns nil for special forms. +I.e., it only returns t for objects that can be passed to `funcall'. + +** The behavior of map-char-table has changed. It may call the +specified function with a cons (FROM . TO) as a key if characters in +that range have the same value. + +** Process changes + +*** The function `dired-call-process' has been removed. + +*** The multibyteness of process filters is now determined by the +coding-system used for decoding. The functions +`process-filter-multibyte-p' and `set-process-filter-multibyte' are +obsolete. + +** The variable `byte-compile-warnings' can now be a list starting with `not', +meaning to disable the specified warnings. The meaning of this list +may therefore be the reverse of what you expect (of course, this is +only an issue if you make use of the new `not' syntax). Rather than +checking/manipulating elements directly, use the new functions +`byte-compile-warning-enabled-p', `byte-compile-disable-warning', and +`byte-compile-enable-warning.' + +** `mode-name' is no longer guaranteed to be a string. +Use `(format-mode-line mode-name)' to ensure a string value. + +** The function x-font-family-list has been removed. +Use the new function font-family-list (see Lisp Changes, below). + +** Internationalization changes + +*** The value of the function `charset-id' is now always 0. + +*** The functions `register-char-codings' and `coding-system-spec' +have been removed. + +*** The cpXXX coding systems are now supported automatically. +The functions cp-...-codepage, which you had to use in Emacs 22 to +enable support for these coding systems, have been deleted. + +*** The following features have been removed. They were used for +displaying various scripts with specific fonts, and are no longer +needed now that OpenType font support is available: + +**** `devanagari' and `devan-util', and all associated devanagari-* and +dev-* functions and variables (formerly used for Devanagari script). + +**** `kannada' and `knd-util', and all associated kannada-* and knd-* +functions and variables (formerly used for Kannada script). + +**** `malayalam' and `mlm-util', and all associated malayalam-* and +mlm-* functions and variables (formerly used for Malayalam script). + +**** `tamil' and `tml-util, and all associated tamil-* and tml-* +functions and variables (formerly used for Tamil script). + +*** The meaning of NAME argument of `set-fontset-font' is changed. +Previously nil is accepted as the default fontset. Now, nil is for +the fontset of the selected frame and t is for the default fontset. + +*** The meaning of FONTSET argument of `print-fontset' is changed. +Now, nil is for the fontset of the selected frame and t is for the +default fontset. + +** If a function in write-region-annotate-functions returns with a +different buffer current, Emacs no longer kills that buffer +automatically. This behavior existed in previous versions of Emacs, +but was undocumented. To kill a buffer after write-region, give the +variable `write-region-post-annotation-function' a buffer-local value +of `kill-buffer'. + +** The variable temp-file-name-pattern has been removed. +This variable was only used by call-process-region, which now uses +temporary-file-directory instead. + +** The COUNT and SYSTEM-FLAG arguments to define-abbrev have been +removed. The function now takes extra arguments for specifying +arbitrary abbrev properties. + +** end-of-defun-function is now guaranteed to work only when called +from the start of a defun. It must now leave point exactly at the end +of defun, since `end-of-defun' now itself moves forward over +whitespace after calling it. + + +* Lisp Changes in Emacs 23.1 + +** The new variable `generate-autoload-cookie' controls the magic comment +string used by `update-file-autoloads' to find autoloaded forms. The +variable `generated-autoload-file' similarly controls the name of the +file where `update-file-autoloads' writes the calls to `autoload'. +The default values are ";;;###autoload" and `loaddefs.el', +respectively. + +** New primitives `list-system-processes' and `process-attributes' +let Lisp programs access the processes that are running on the local +machine. See the doc strings of these functions for more details. +Not all platforms support accessing this information; on those that +don't, these primitives will return nil. + +** New variable `user-emacs-directory'. +Use this instead of "~/.emacs.d". + +** If a local hook function has a non-nil `permanent-local-hook' +property, `kill-all-local-variables' does not remove it from the local +value of the hook variable; it remains even if you change major modes. + +** `frame-inherited-parameters' lets new frames inherit parameters from +the selected frame. + +** New keymap `input-decode-map' overrides like key-translation-map, but +applies before function-key-map. Also it is terminal-local contrary to +key-translation-map. Terminal-specific key-sequences are generally added to +this map rather than to function-key-map now. + +** `ignore-errors' is now a standard macro (does not require the CL package). + +** `interprogram-paste-function' can now return one string or a list +of strings. In the latter case, Emacs puts the second and following +strings on the kill ring. + +** In `condition-case', a handler can specify "let the debugger run first". +You do this by writing `debug' in the list of conditions to be handled, +like this: + + (condition-case nil + (foo bar) + ((debug error) nil)) + +** clone-indirect-buffer now runs the clone-indirect-buffer-hook. + +** `beginning-of-defun-function' now takes one argument, the count given to +`beginning-of-defun'. (N.B. `end-of-defun-function' doesn't take any +arguments.) + +** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED. +IDENTIFICATION specifies which part of the remote identifier has to be +returned. With CONNECTED passed non-nil, it is checked whether a +remote connection has been established already. + +** The new macro `declare-function' suppresses compiler warnings about +undefined functions. + +** Changes to interactive function handling + +*** The new interactive spec code ^ says to first call +handle-shift-selection if shift-select-mode is non-nil, before reading +the command arguments. This is used for shift-selection (see above). + +*** Built-in functions can now have an interactive specification that +is not a prompt string. If the `intspec' parameter of a `DEFUN' +starts with a `(', the string is evaluated as a Lisp form. + +*** The interactive-form of a function can be added post-facto via the +`interactive-form' symbol property. Mostly useful to add complex +interactive forms to subroutines. + +** Region changes + +*** Commands should use `use-region-p' to test whether there is +an active region that they should operate on. + +*** `region-active-p' returns non-nil when Transient Mark mode is +enabled and the mark is active. Most commands that act specially on +the active region in Transient Mark mode should use `use-region-p' +instead of `region-active-p', because `use-region-p' obeys the new +user option `use-empty-active-region' (see Editing Changes, above). + +*** If a command sets `transient-mark-mode' to (only . OLDVAL), that +means to activate transient-mark-mode temporarily, until the next +unshifted point motion command or mark deactivation. Afterwards, +reset transient-mark-mode to the value OLDVAL. The values `only' and +`identity', introduced in Emacs 22, are now deprecated. + +** Emacs session information + +*** The new variables `before-init-time' and `after-init-time' record the +value of `current-time' before and after Emacs loads the init files. + +*** The new function `emacs-uptime' returns the uptime of an Emacs instance. + +*** The new function `emacs-init-time' returns the duration of the +Emacs initialization. + +** Changes affecting display-buffer + +*** display-buffer tries to be smarter when splitting windows. +The new option split-window-preferred-function lets you specify your own +function to pop up new windows. Its default value split-window-sensibly +can split a window either vertically or horizontally, whichever seems +more suitable in the current configuration. You can tune the behavior +of split-window-sensibly by customizing split-height-threshold and the +new option split-width-threshold. Both options now take the value nil +to inhibit splitting in one direction. Setting split-width-threshold to +nil inhibits horizontal splitting and gets you the behavior of Emacs 22 +in this respect. In any case, display-buffer may now split the largest +window vertically even when it is not as wide as the containing frame. + +*** If pop-up-frames has the value `graphic-only', display-buffer only +makes a separate frame on graphic displays. + +*** select-frame and set-frame-selected-window have a new optional +argument NORECORD. If non-nil, this will avoid messing with the order +of recently selected windows and the buffer list. + +** Window parameters can now be defined. +These are analogous to frame parameters, but are associated with +individual windows. + +*** The new functions window-parameters, window-parameter, and +set-window-parameter are used to query and set window parameters. + +** Minibuffer and completion changes + +*** A list of default values can be specified for the DEFAULT argument of +functions `read-from-minibuffer', `read-string', `read-command', +`read-variable', `read-buffer', `completing-read'. Elements of this list +are available for inserting into the minibuffer by typing `M-n'. +For empty input these functions return the first element of this list. + +*** New function `read-regexp' uses the regexp history and some useful +regexp defaults (string at point, last Isearch/replacement regexp/string) +via M-n when reading a regexp in the minibuffer. + +*** minibuffer-local-must-match-filename-map is now named +minibuffer-local-filename-must-match-map. + +*** The `require-match' argument to `completing-read' accepts the new +values `confirm-only' and `confirm-after-completion'. + +** Search and replacement changes + +*** The regexp form \(?:\) specifies the group number explicitly. + +*** New function `match-substitute-replacement' returns the result of +`replace-match' without actually using it in the buffer. + +*** The new variable `replace-search-function' determines the function +to use for searching in query-replace and replace-string. The +function it specifies is called by `perform-replace' when its 4th +argument is nil. + +*** The new variable `replace-re-search-function' determines the +function to use for searching in `query-replace-regexp', +`replace-regexp', `query-replace-regexp-eval', and +`map-query-replace-regexp'. The function it specifies is called by +`perform-replace' when its 4th argument is non-nil. + +*** New keymap `search-map' bound to `M-s' provides global bindings +for search related commands. + +*** New keymap `multi-query-replace-map' contains additonal keys bound +to `automatic-all' and `exit-current' for multi-buffer interactive replacement. + +*** The variable `inhibit-changing-match-data', if non-nil, prevents +the search and match primitives from changing the match data. + +*** New functions `word-search-forward-lax' and `word-search-backward-lax'. +These are like `word-search-forward and `word-search-backward', except +that the end of the search string need not match a word boundary, +unless it ends in whitespace. + +** File handling changes + +*** set-file-modes is now interactive and can take the mode value in +symbolic notation thanks to auxiliary functions. + +*** file-local-variables-alist stores an alist of file-local +variables defined in the current buffer. + +** Face-remapping + +*** Each face can be remapped to a different face definition using the +variable `face-remapping-alist'. This is an alist that maps faces to +replacement definitions (which can be face names, lists of face names, +or attribute/value plists. If this variable is buffer-local, the +remapping occurs only in that buffer. + +*** text-scale-mode remaps the default face to a larger or smaller +size in the current buffer. This feature is used by the Buffer Face +menu and the new `C-x C-+', `C-x C--', and `C-x C-0' commands (see +Editing Changes, above). + +*** New functions: + +**** `face-remap-add-relative' adds a face remapping entry to the +current buffer. + +**** ``face-remap-remove-relative' removes a face remapping entry from +the current buffer. + +**** `face-remap-reset-base' restores a face to its global definition. + +**** `face-remap-set-base' sets the base remapping of a face. + +** Process changes + +*** The new function `start-file-process' is similar to `start-process', +but obeys file handlers. The file handler is chosen based on +`default-directory'. The functions `start-file-process-shell-command' +and `process-file-shell-command' are also new; they call internally +`start-file-process' and `process-file', respectively. + +*** The new function `process-lines' executes an external program and +returns its output as a list of lines. + +** Character code, representation, and charset changes. + +*** In multibyte buffers and strings, characters are represented by +UTF-8 byte sequences. The character code space is now 0x0..0x3FFFFF +with no gap; code points 0x0..0x10FFFF are Unicode characters of the +same code points, while code points 0x3FFF80..0x3FFFFF are raw 8-bit +bytes. + +*** Generic characters no longer exist. + +*** The concept of a charset has changed. A single character may +belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets +unicode, iso-8859-1, iso-8859-3, etc). + +**** The dimension of a charset is now 1, 2, 3, or 4, and the size of +each dimension is no longer limited to 94 or 96. + +**** A dynamic charset priority list is used to infer the charset of +characters for display. + +*** The functions `split-char' and `make-char' now accept up to 4 +positional codes instead of just 2. + +*** The functions `encode-char' and `decode-char' now accept any character sets. + +*** The function `define-charset' now accepts a completely different +form of arguments (old-style arguments still work). + +*** The value of the function `char-charset' depends on the current +priorities of charsets. + +*** The function get-char-code-property now accepts many Unicode base +character properties. They are `name', `general-category', +`canonical-combining-class', `bidi-class', `decomposition', +`decimal-digit-value', `digit-value', `numeric-value', `mirrored', +`old-name', `iso-10646-comment', `uppercase', `lowercase', and +`titlecase'. + +*** The functions `modify-syntax-entry' and `modify-category-entry' now +accept a cons of characters as the first argument, and modify all +entries in that range of characters. + +*** Use of `translation-table-for-input' for character code unification +is now obsolete, since Emacs 23.1 and later uses Unicode as basis for +internal representation of characters. + +*** New functions: + +**** `characterp' returns t if and only if the argument is a character. +This replaces `char-valid-p', which is now obsolete. + +**** `max-char' returns the maximum character code (currently #x3FFFFF). + +**** `define-charset-alias' defines an alias of a charset. + +**** `set-charset-priority' sets priorities of charsets. + +**** `charset-priority-list' returns a prioritized list of charsets. + +**** `unibyte-string' makes a unibyte string from bytes. + +**** `define-char-code-property' defines a character code property. + +**** `char-code-property-description' returns the description string of +a character code property. + +*** New variables: + +**** `find-word-boundary-function-table' is a char-table of functions to +search for a word boundary. + +**** `char-script-table' is a char-table of script names. + +**** `char-width-table' is a char-table of character widths. + +**** `print-charset-text-property' controls how to handle `charset' text +property on printing a string. + +**** `printable-chars' is a char-table of printable characters. + +** Code conversion changes + +*** The new function `define-coding-system' should be used to define a +coding system instead of `make-coding-system' (which is now obsolete). + +*** The functions `encode-coding-region' and `decode-coding-region' +have an optional 4th argument to specify where the result of +conversion should go. + +*** The functions `encode-coding-string' and `decode-coding-string' +have an optional 4th argument specifying a buffer to store the result +of conversion. + +*** The new variable `inhibit-null-byte-detection' controls whether to +consider text with null bytes as binary data. By default, it is +`nil', and Emacs uses `no-conversion' for any text containing null +bytes. + +*** The functions `set-coding-priority' and `make-coding-system' are obsolete. + +*** New functions: + +**** `with-coding-priority' executes Lisp code using the specified +coding system priority order. + +**** `check-coding-systems-region' checks if the text in the region is +encodable by the specified coding systems. + +**** `coding-system-aliases' returns a list of aliases of a coding system. + +**** `coding-system-charset-list' returns a list of charsets supported +by a coding system. + +**** `coding-system-priority-list' returns a list of coding systems +ordered by their priorities. + +**** `set-coding-system-priority' sets priorities of coding systems. + +**** `coding-system-from-name' returns a coding system matching with +the argument name. + +** There is a new input method, Robin, different from Quail. +It has three functionalities: + i) a simple input method (converts an ASCII sequence into a string). +ii) converts an existing buffer substring into another string +iii) reverse conversion (each character produced by a +robin rule can hold the original ASCII sequence as a char-code-property) + +*** The new function `robin-define-package' defines a Robin package. + +*** The new function `robin-modify-package' modifies an existing Robin package. + +*** The new function `robin-use-package' starts using a Robin package +as an input method. + +*** The new function `string-to-unibyte' is like `string-as-unibyte' +but signals an error if STRING contains a non-ASCII, non-eight-bit +character. + +** Changes related to the new font backend + +*** Which font backends to use can be specified by the X resource +"FontBackend". For instance, to use both X core fonts and Xft fonts: + +Emacs.FontBackend: x,xft + +If this resource is not set, Emacs tries to use all font backends +available on your graphic device. + +*** New frame parameter `font-backend' specifies a list of +font-backends supported by the frame's graphic device. On X, they are +currently `x' and `xft'. + +*** The function `set-fontset-font' now accepts a script name as the +second argument, and has an optional 5th argument to control how to +set the font. + +*** New functions: + +**** `fontp' checks if the argument is a font-spec or font-entity. + +**** `font-spec' creates a new font-spec object. + +**** `font-get' returns a font property value. + +**** `font-put' sets a font property value. + +**** `font-face-attributes' returns a plist of face attributes set by a font. + +**** `list-fonts' returns a list of font-entities matching a font spec. + +**** `find-font' returns the font-entity best matching the given font spec. + +**** `font-family-list' returns a list of family names of available fonts. + +**** `font-xlfd-name' returns an XLFD name of a given font spec, font +entity, or font object. + +**** `clear-font-cache' clears all font caches. + +** Changes related to multiple-terminal (multi-tty) support + +*** $TERM is now set to `dumb' for subprocesses. If you want to know the +$TERM inherited by Emacs you will have to look inside initial-environment. + +*** $DISPLAY is now dynamically inherited from the frame's `display'. + +*** The `window-system' variable is now frame-local. The new +`initial-window-system' variable contains the `window-system' value +for the first frame. `window-system' is also now a function that +takes a frame argument. + +*** The `keyboard-translate-table' variable and the terminal and +keyboard coding systems are now terminal-local. + +*** You can specify a terminal device (`tty' parameter) and a terminal +type (`tty-type' parameter) to `make-terminal-frame'. + +*** The function `make-frame-on-display' now works during a tty +session. + +*** A new `terminal' data type. +The functions `get-device-terminal', `terminal-parameters', +`terminal-parameter', `set-terminal-parameter' use this data type. + +*** Function key sequences are now mapped using `local-function-key-map', +a new variable. This inherits from the global variable function-key-map, +which is not used directly any more. + +*** New hooks: + +**** before-hack-local-variables-hook is called after setting new +variable file-local-variables-alist, and before actually applying the +file-local variables. + +**** `suspend-tty-functions' and `resume-tty-functions' are called +after a tty frame has been suspended or resumed, respectively. The +functions are called with the terminal id of the frame being +suspended/resumed as a parameter. + +**** The special hook `delete-terminal-functions' is called before +deleting a terminal. + +*** New functions: + +**** `delete-terminal' + +**** `suspend-tty' + +**** `resume-tty'. + +*** `initial-environment' holds the environment inherited from Emacs's parent. + +** Redisplay changes + +*** For underlined characters, the distance between the underline and +the baseline is controlled by a new variable, `underline-minimum-offset'. + +*** You can now pass the value of the `invisible' property to +invisible-p to check whether it would cause the text to be invisible. +This is convenient when checking invisibility of text with no buffer +position (e.g. in before/after-strings). + +*** `clear-image-cache' can be told to flush only images of a specific file. + +*** `vertical-motion' can now be given a goal column. +It now accepts a cons cell (COLS . LINES) in its first argument, which +says to stop, where possible, at a pixel x-position equal to COLS +times the default column width. + +*** redisplay-end-trigger-functions, set-window-redisplay-end-trigger, +and window-redisplay-end-trigger are obsolete. Use `jit-lock-register' +instead. + +*** The new variables `wrap-prefix' and `line-prefix' specify display +specs which are appended at display-time to every continuation line +and non-continuation line, respectively. In addition, Emacs +recognizes the `wrap-prefix' and `line-prefix' text or overlay +properties; these have the same effects as the variables of the same +name, but take precedence. + +** The Lisp interpreter now treats non-breaking space as whitespace. + +** Miscellaneous new functions + +*** `apply-partially' performs a "curried" application of a function. + +*** `buffer-swap-text' swaps text between two buffers. This can be +useful for modes such as tar-mode, archive-mode, RMAIL. + +*** `combine-and-quote-strings' produces a single string from a list of strings +sticking a separator string in between each pair, and quoting those +strings that include the separator as their substring. Useful for +consing shell command lines from the individual arguments. + +*** `custom-note-var-changed' tells Custom to treat the change in a +certain variable as having been made within Custom. + +*** `face-all-attributes' returns an alist describing all the basic +attributes of a given face. + +*** `format-seconds' converts a number of seconds into a readable +string of days, hours, etc. + +*** `image-refresh' refreshes all images associated with a given image +specification. + +*** `locate-user-emacs-file' helps packages to select the appropriate +place to save user-specific files. It defaults to `user-emacs-directory' +unless the file already exists at $HOME. + +*** `read-color' reads a color name using the minibuffer. + +*** `read-shell-command' does what its name says, with completion. It +uses the minibuffer-local-shell-command-map for that. + +*** `split-string-and-unquote' splits a string into a list of substrings +on the boundaries of a given delimiter, and unquotes the substrings that +are quoted. Useful for taking apart shell commands. + +*** The two new functions `looking-at-p' and `string-match-p' can do +the same matching as `looking-at' and `string-match' without changing +the match data. + +*** The two new functions `make-serial-process' and +`serial-process-configure' provide a Lisp interface to the new serial +port support (see Emacs changes, above). + +** Miscellaneous new variables + +*** `auto-save-include-big-deletions', if non-nil, means auto-save is +not turned off automatically after a big deletion. + +*** `read-circle', if nil, disables the reading of recursive Lisp +structures using the #N= and #N# syntax. + +*** `this-command-keys-shift-translated' is non-nil if the key +sequence invoking the current command was found by shift-translation. + +*** `window-point-insertion-type' determines the insertion-type of the +marker used for window-point. + +*** bookmark provides `bookmark-make-record-function' so special major +modes like Info can teach bookmark.el how to save and restore the +relevant data. + +*** `fill-forward-paragraph-function' specifies which function the +filling code should use to find paragraph boundaries. + + +* New Packages for Lisp Programming in Emacs 23.1 + +** The new package avl-tree.el deals with the AVL tree data structure. + +** The new package check-declare.el verifies the accuracy of +declare-function macros (see Lisp Changes, above). + +** find-cmd.el can build `find' commands using lisp syntax. + +** The package misearch.el has been added. It allows Isearch to search +through multiple buffers. A variable `multi-isearch-next-buffer-function' +defines the function to call to get the next buffer to search in the series +of multiple buffers. Top-level functions `multi-isearch-buffers', +`multi-isearch-buffers-regexp', `multi-isearch-files' and +`multi-isearch-files-regexp' accept a single argument that specifies +a list of buffers/files to search for a string/regexp. + +** The new major mode `special-mode' is intended as a parent for +major modes such as those that set the "'mode-class 'special" property. + + +---------------------------------------------------------------------- +This file is part of GNU Emacs. + +GNU Emacs is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs. If not, see . + + +Local variables: +mode: outline +paragraph-separate: "[ ]*$" +end: + +arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2