Emacs NEWS.23

EDE now refuses to automatically load a project file (Project.ede) unless the file is in one of the directories specified by this variable. This reduces the risk of inadvertently loading malicious project files. The commands 'M-x ede-new' and 【M-x ede】 now offer to save directories to 「ede-project-directories」.

This can be used in place of the default 「appt-message-warning-time」.

current directory by setting 「python-remove-cwd-from-path」 to nil.

MIME contents automatically. You can customize the variable 「rmail-enable-mime」 back to 'nil' to disable this automatic MIME decoding.

between decoded presentation form and raw data if 「rmail-enable-mime」 is non-nil. And, with prefix argument, it change only the displaying of the MIME entity at point.

to the next item of MIME message.

point to the previous item of MIME message.

body of the MIME entity at point.

This shows a log of changes to be received with a pull operation. For Git, this runs "git fetch" to make the necessary data available locally; this requires version 1.7 or newer.

This shows a log of changes to be sent in the next commit.

reruns the corresponding VC command to compute an up to date version of the buffer.

You can add headers specifying additional information to be supplied to the version control system. For example:

Author: J. R. Hacker <jrh@example.com> Fixes: 4204 Actual text of log entry…

Bazaar recognizes the headers "Author", "Date" and "Fixes". Git, Mercurial, and Monotone recognize "Author" and "Date". Any unknown header is left as is in the message, so it is not lost.

This might not work on all platforms.

were loaded.

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).

via the XSETTINGS mechanism. This includes antialias, hinting, hintstyle, RGBA, DPI and lcdfilter changes.

unconditionally. The previous behavior, toggling the mode, was neither reliable nor generally desirable.

add-file-local-variable, delete-file-local-variable, add-file-local-variable-prop-line, and delete-file-local-variable-prop-line.

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.

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.

This is suitable for default-file-name-coding-system on Mac OS X; see international/ucs-normalize.el.

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.

commands save the interprogram-paste selection into the kill ring before doing anything else. This avoids losing the selection.

subsequent kills are not duplicated in the kill-ring.

For instance, this can complete M-x lch to list-command-history.

are displayed in the Completions buffer. If you set it to 'vertical', completions are sorted vertically in columns.

user-emacs-directory; but the old location, ~/.calc.el, is used if that file exists.

the native Windows port of Gnuplot version 3.8 or later installed.

If you prefer the simple display, customize 「diary-display-function」.

giving an offset from today.

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 buffers to be reverted automatically on revisiting them.

on the page edge advances to the next/previous page.

and can be run in batch mode.

functions and variables. Customize 「elint-scan-preloaded」 if you want to sacrifice some accuracy for a faster startup.

collections as watch expressions. These features require GDB 7.0 or later.

matched topics found in the index.

manual that generates an Info file which gives the same information through a menu structure.

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.

This starts an incremental search of the comint/shell input history.

To disable it, set ansi-color-for-comint-mode to nil.

On systems which support GVFS-Fuse, Tramp offers also the new connection methods "dav", "davs", "obex" and "synce".

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.

This displays a 'vc-change-log' buffer showing the history of the version-controlled directory tree as a whole.

This is similar to vc-diff, but compares the entire directory tree of the current VC directory with its working revision.

The number of entries shown can be chosen interactively with a prefix argument, or by customizing vc-log-show-limit. The 'vc-change-log' buffer now contains buttons at the end of the buffer, which can be used to increase the number of entries shown. RCS, SCCS, and CVS do not support this feature.

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.

instead of redisplaying the full log. The RCS, CVS and SCCS VC backends do not support this.

displayed in the vc-dir header, shelves can be created, removed and applied.

are stripped when copying text from the ChangeLog to the VC-Log buffer.

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.

Thus, they change default-directory to reflect the new user id, and let commands run under that user's permissions. This works even when default-directory is already remote. Calling the external commands is possible via '*su' or '*sudo', respectively.

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.

projects, including features such as automatic Makefile generation.

To enable EDE, use the minor mode global-ede-mode. See the EDE manual for details.

code. It is currently used by some parts of Semantic and EDE; in the future, it may be used for code generation features.

System (CLOS). It is used by the other CEDET packages.

This maximizes the frame.

virtual desktops.

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.

facilities on a particular region of text.

for completions displayed in Completions.

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.

now only take a single 'command' argument.

if a process-file call does not change a remote file. This allows file name handlers such as Tramp to optimizations.

the function byte-compile-dest-file before loading bytecomp.el is obsolete. Instead, customize byte-compile-dest-file-function.

(e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").

where Emacs is running).

OpenType fonts.

a GIF library.

executable format.

NO_SHAREDLIBS compilation flag).

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.

–daemon command line argument. It disconnects from the terminal and starts the server. Clients can connect and create graphical or terminal frames using emacsclient.

remote display. There are some bugs for Gtk+. See etc/PROBLEMS.

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 https://specifications.freedesktop.org/xembed-spec/xembed-spec-latest.html for details about XEmbed.

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.

(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.

See M-x list-character-sets. New charsets can be defined conveniently as tables of Unicode code points.

Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu, Sinhala, and TaiViet.

unify-8859-on-decoding-mode are obsolete.

accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for decimal). It also accepts Unicode character names with completion.

Common typographical characters available from Unicode were added to 「cyrillic-translit」: punctuation marks, accented characters, fractions, and others.

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.

"Save Options" item is used.

This contains commands provided by EasyPG, the newly-included interface to GnuPG (see New Modes and Packages).

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).

More major and minor modes now have a mode specific menu, and existing mode menus have been improved to include more functionality.

default-directory for the current buffer is on a remote machine.

minor mode, in the same way as it already did for major modes.

mode-line information (e.g. waiting for a VC command to finish).

line are now interactive: mouse-1 can be used on them to pop up a menu.

activating it.

region is active. Otherwise, it fills the current paragraph.

region if the region is active. Otherwise, it checks spelling of the word at point.

region is active.

active region in Transient Mark mode should make commands operate on that empty region.

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.

mouse-selection, are not necessarily deactivated after the next command. They are deactivated only 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).

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.

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.

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.

name of the current buffer.

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.

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.

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).

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.

completion-ignore-case for file name completion.

completion-ignore-case for buffer name completion.

possible completions, rather than stopping at the common prefix.

buffer only on the second attempt to complete. This was already supported in 「partial-completion-mode」.

size of the default face in the current buffer. The face is changed via face remapping (see Lisp changes, below).

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」.

remap the default face in the current buffer. See "Buffer Face mode", under New Modes and Packages.

selection by setting 'x-select-enable-primary' to nil.

specify a minimum window width for partial-width windows, below which lines are truncated. The default has been changed to 50.

vertically and horizontally.

is on a different frame.

This moves the current line to window center, top and bottom on successive invocations.

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.

'\N' and '\&' substituted according to the match. Old behavior can be restored by customizing query-replace-show-replacement.

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.

matches a regexp.

Therefore, comment-start markers are inserted at the current indentation of the region to comment, rather than the leftmost column.

pp-macroexpand-last-sexp pretty-print macro expansions.

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.

visited source file. Its value can be a number (e.g. 0 for top line, -1 for bottom line), or nil for no recentering.

kill into the password.

are ignored. Customize the 'tooltip' face instead.

any invalid parts of your document.

attribute name or data value by using information about what is allowed by the schema in that context.

abbrev-table-put, abbrev-table-p, abbrev-insert, abbrev-table-menu.

extra arguments for arbitrary properties.

':count', ':system', ':enable-function', ':case-fixed'.

':parents', ':case-fixed', ':enable-function', ':regexp', 「abbrev-table-modiff」.

'string', disabled by default.

identify cited keys in BibTeX entries, used by 「bibtex-find-crossref」.

bookmark.el can read a .emacs.bmk file saved by an older Emacs, but an older Emacs cannot read one saved by Emacs 23.

「calc-embedded-word」 in place of delimiters.

version for reference.

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」.

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.

See the variables: calendar-left-margin, calendar-intermonth-spacing, calendar-column-width, calendar-day-header-width, and calendar-day-digit-width.

See the variables calendar-intermonth-header and calendar-intermonth-text.

It has been used to add items to the list holiday-oriental-holidays.

the list (1 2 … DAYS).

associated with the current log entry.

source code associated with a log entry.

It has different colors for to show that: (a) the command is still running, (b) successful completion, (c) error.

the first error encountered during compilations.

says to stop auto scrolling at the first error that occurs.

improved. 'hh' can be used to match C++ header files and 'cchh' both C++ sources and headers.

Only copyright lines with holders matching 「copyright-names-regexp」 are considered for update.

This is controlled by 「copyright-at-end-flag」 (used by, e.g., change-log-mode).

set a variable's 「safe-local-variable」 and 「risky-local-variable」 property.

It's used automatically as you move through hunks, see diff-auto-refine-mode. It is bound to 'C-c C-b'.

buffer and tries to create ChangeLog entries for each change. It is bound to 【C-x 4 A】.

whitespace problems in the modified lines.

and C-x C-q in wdired-mode exits it with asking a question about saving changes.

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'.

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.

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.

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」.

Customize the variable 「fortran-line-length」 to change it.

rather than fortran-indent-comment.

There are many new features, bug fixes and improvements; see the file GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.

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」.

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.

than with-output-to-temp-buffer with 「print-help-return-message」.

window shall be automatically selected when invoking help.

position for point in help window (for example in view-lossage).

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.

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.

runs 'occur' with the current search string. The same key 【M-s o】 is bound globally to the command 'occur'.

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.

for buff-menu.el and ibuffer.el are bound to the keys 'M-s a C-s' and 'M-s a M-C-s'.

「isearch-fail」 face.

【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 for Isearch mode. All the other Help commands exit Isearch mode and execute their global definitions.

history. See 'Minibuffer changes', above.

that either version can be used as inferior Python by python.el.

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.

remote files, if there is no established connection to the corresponding remote host.

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".

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.

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.

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 message as displayed, appending it to an mbox file.

Previously, this information was hidden.

permits to customize indentation of LaTeX environments delimited by escaped parens.

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.

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 are supported now as host names. They must be embedded in square brackets, like in "/ssh:[::1]:".

The pseudo-method "multi" has been removed. Instead, multi hops can be specified by the new variable 「tramp-default-proxies-alist」.

Default values can be set via the variables 「tramp-default-user」, 「tramp-default-user-alist」 and 「tramp-default-host」.

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」.

Running processes on a remote host can be controlled by settings in 「tramp-remote-path」 and 「tramp-remote-process-environment」.

When the variable file-precious-flag is set, the success of a remote file copy is checked via the file's checksum.

Tramp uses the package 「auth-source」 to read passwords from a file, if necessary.

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.

status. It allows to apply various VC operations to a file, a directory or a set of files/directories.

(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".

case keys instead of the upper case keys used in the past.

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.

the current line.

of the corresponding buffer as long as the asynchronous process is active.

For now only CVS, RCS, SCCS and SVN support this functionality. This is done by the 「modify-change-comment」 backend function.

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.

to update it to the new VC.

If default-directory is a remote file name, subprocesses are started on the corresponding remote system.

with the face 「eldoc-highlight-function-argument」.

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.

Use gud-gdb if you want the (old) text command mode.

goto-address-prog-mode, which buttonize URLS and email addresses.

directories in which 「ffap-rfc」 will first search for RFCs.

See option 「hide-ifdef-shadow」 and function 「hide-ifdef-toggle-shadowing」.

See Info-breadcrumbs-depth to control it.

It is used to configure wireless interfaces.

It's used automatically as you move through conflicts, see smerge-auto-refine-mode.

package. It creates a buffer with an updating time display using several time zones.

See the documentation of the variables: tex-fontify-script, tex-font-script-display, tex-suscript-height-ratio, and tex-suscript-height-minimum.

since users found iconification of view-mode frames distracting.

search path. This can be disabled by setting woman-locale to nil.

coding-system used for decoding. The functions 「process-filter-multibyte-p」 and 「set-process-filter-multibyte」 are obsolete.

have been removed.

The functions cp-…-codepage, which you had to use in Emacs 22 to enable support for these coding systems, have been deleted.

displaying various scripts with specific fonts, and are no longer needed now that OpenType font support is available:

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.

Now, nil is for the fontset of the selected frame and t is for the default fontset.

handle-shift-selection if shift-select-mode is non-nil, before reading the command arguments. This is used for shift-selection (see above).

is not a prompt string. If the 'intspec' parameter of a 'DEFUN' starts with a '(', the string is evaluated as a Lisp form.

interactive-form symbol property. Mostly useful to add complex interactive forms to subroutines.

an active region that they should operate on.

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).

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.

value of current-time before and after Emacs loads the init files.

Emacs initialization.

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.

makes a separate frame on graphic displays.

argument NORECORD. If non-nil, this will avoid messing with the order of recently selected windows and the buffer list.

set-window-parameter are used to query and set window parameters.

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.

regexp defaults (string at point, last Isearch/replacement regexp/string) via M-n when reading a regexp in the minibuffer.

minibuffer-local-filename-must-match-map.

values 「confirm-only」 and 「confirm-after-completion」.

replace-match without actually using it in the buffer.

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.

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.

for search related commands.

to 「automatic-all」 and 「exit-current」 for multi-buffer interactive replacement.

the search and match primitives from changing the match data.

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.

symbolic notation thanks to auxiliary functions.

variables defined in the current buffer.

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.

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).

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.

returns its output as a list of lines.

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.

belong to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets unicode, iso-8859-1, iso-8859-3, etc).

positional codes instead of just 2.

form of arguments (old-style arguments still work).

priorities of charsets.

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'.

accept a cons of characters as the first argument, and modify all entries in that range of characters.

is now obsolete, since Emacs 23.1 and later uses Unicode as basis for internal representation of characters.

coding system instead of 「make-coding-system」 (which is now obsolete).

have an optional 4th argument to specify where the result of conversion should go.

have an optional 4th argument specifying a buffer to store the result of conversion.

consider text with null bytes as binary data. By default, it is 'nil', and Emacs uses 「no-conversion」 for any text containing null bytes.

as an input method.

but signals an error if STRING contains a non-ASCII, non-eight-bit character.

"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.

font-backends supported by the frame's graphic device. On X, they are currently 'x' and 'xft'.

second argument, and has an optional 5th argument to control how to set the font.

$TERM inherited by Emacs you will have to look inside initial-environment.

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.

keyboard coding systems are now terminal-local.

type (tty-type parameter) to make-terminal-frame.

session.

The functions get-device-terminal, terminal-parameters, terminal-parameter, set-terminal-parameter use this data type.

a new variable. This inherits from the global variable function-key-map, which is not used directly any more.

the baseline is controlled by a new variable, underline-minimum-offset.

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).

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.

and window-redisplay-end-trigger are obsolete. Use jit-lock-register instead.

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.

useful for modes such as tar-mode, archive-mode, RMAIL.

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.

certain variable as having been made within Custom.

attributes of a given face.

string of days, hours, etc.

specification.

place to save user-specific files. It defaults to user-emacs-directory unless the file already exists at $HOME.

uses the minibuffer-local-shell-command-map for that.

on the boundaries of a given delimiter, and unquotes the substrings that are quoted. Useful for taking apart shell commands.

the same matching as looking-at and string-match without changing the match data.

serial-process-configure provide a Lisp interface to the new serial port support (see Emacs changes, above).

not turned off automatically after a big deletion.

structures using the #N= and #N# syntax.

sequence invoking the current command was found by shift-translation.

marker used for window-point.

modes like Info can teach bookmark.el how to save and restore the relevant data.

filling code should use to find paragraph boundaries.