1 GNU Emacs NEWS -- history of user-visible changes.
3 Copyright (C) 2007, 2008 Free Software Foundation, Inc.
4 See the end of the file for license conditions.
6 Please send Emacs bug reports to emacs-pretest-bug@gnu.org.
7 If possible, use M-x report-emacs-bug.
9 This file is about changes in Emacs version 23.
11 See files NEWS.22, NEWS.21, NEWS.20, NEWS.19, NEWS.18, and NEWS.1-17
12 for changes in older Emacs versions.
14 You can narrow news to a specific version by calling `view-emacs-news'
15 with a prefix argument or by typing C-u C-h C-n.
18 +++ indicates that the appropriate manual has already been updated.
19 --- means no change in the manuals is called for.
20 When you add a new item, please add it without either +++ or ---
21 so we will look at it and add it to the manual.
24 * About external Lisp packages
27 * Installation Changes in Emacs 23.1
29 ** The default X toolkit is now Gtk+, rather than Lucid.
30 The configure option `--with-gtk' has been removed. Gtk is now the
31 default toolkit, but you can use --with-x-toolkit=gtk if necessary.
34 Fonts are handled by new code capable of dealing with multiple font
35 backends. This uses the freetype and fontconfig libraries.
37 *** Emacs now accepts font names supplied in the fontconfig format
38 (e.g. "monospace-12:bold") and GTK format (e.g. "Monospace Bold 12").
40 *** Added support for local fonts (fonts installed on the machine
41 where Emacs is running).
43 *** Added support for the Xft library for antialiasing.
45 *** Added support for the otf library for complex text layout by
48 *** Added support for the m17n library for text shaping.
50 ** Changes to image support
52 *** configure now checks for libgif before libungif when searching for
55 *** Emacs now supports the SVG image format through librsvg2.
57 *** Emacs now supports multi-page TIFF images.
59 ** New NeXTSTEP-based port
60 This provides support for GNUstep (via the GNUstep libraries) and Mac
61 OS X (via the Cocoa libraries).
63 Specify --with-ns to configure for this. By default, a self-contained
64 app will be built (containing all lisp). To install/share lisp with
65 other emacsen (e.g. X11 build) use --disable-ns-self-contained. See
66 nextstep/README and nextstep/INSTALL in the Emacs source directory.
68 ** Mac OS X is no longer supported via Carbon.
69 Use the NeXTSTEP port, described above.
71 ** The new configuration option "--with-dbus" enables D-Bus language
74 ** Support for many obsolete platforms has been removed.
75 See the list at the end of etc/MACHINES for details.
77 *** Support for systems without alloca has been removed.
79 *** Support for Sun windows has been removed.
81 *** The `emacstool' utility has been removed.
83 ** The following platforms will be removed in a future Emacs version:
84 If you are still using Emacs on one of these platforms, please email
85 emacs-devel@gnu.org to inform the Emacs developers.
87 *** Old GNU/Linux systems based on libc version 5.
89 *** Old FreeBSD, NetBSD, and OpenBSD systems based on the COFF
92 *** Solaris versions 2.6 and below.
94 *** Solaris on IBM RS6000 machines.
96 *** UNIX System V (the original SysV, not later platforms based on it).
98 *** Unixware on non-x86 machines.
100 *** Platforms not supporting shared libraries (i.e., requiring the
101 NO_SHARED_LIBS compilation flag).
104 ** The configure options `--with-gcc', `--without-gcc' have been removed.
105 Configure will use gcc by default. Set the CC environment variable if
106 you need control over which C compiler is used.
108 ** The refcards are now shipped as PDF files.
111 ** Emacs 23 comes with a new set of default icons.
112 Various resolutions are available as etc/images/icons/hicolor/*/apps/emacs.png.
113 The Emacs 22 icon is available as `emacs22.png' in the same location.
115 * Changes in Emacs 23.1
117 ** Improved X Window System support
119 *** Emacs now supports using both X displays and ttys in one session.
120 With an Emacs server active (M-x server-start), `emacsclient -t'
121 creates a tty frame connected to the running emacs server. You can
122 use any number of different ttys. `emacsclient -c' creates a new X11
123 frame on the current $DISPLAY (or a tty frame if $DISPLAY is not set).
125 You can test for the presence of this feature in your Lisp code by
126 testing for the `multi-tty' feature.
128 **** Emacsclient can now open new terminal frames.
129 Now, the default behavior is to open a new Emacs frame by default.
130 Use the -c option to get the old behavior of opening files in the
131 currently selected Emacs frame.
133 *** Emacs can now start in background, as a daemon when using the
134 --daemon command line argument. It disconnects from the terminal and
135 starts the server. Clients can connect and create graphical or
136 terminal frames using emacsclient.
138 *** The new command close-display-connection closes a connection to a
141 *** Emacs now supports the XEmbed specification.
142 You can embed Emacs in another application on X11. The new command line
143 option --parent-id is used to pass the parent window id to Emacs. See
144 http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
145 for details about XEmbed.
147 *** Emacs can now set the frame opacity.
148 The opacity of a frame can be controlled by setting the `alpha' frame
149 parameter. This only takes effect on a compositing window manager for
150 the X Window System, such as Compiz, Beryl and Compiz Fusion, or on
151 Windows 2000 and later versions of Windows.
153 The alpha parameter should be an integer between 0 (transparent) and
154 100 (opaque), or a float number between 0.0 and 1.0. It can also be a
155 cons cell (ACTIVE . INACTIVE), where ACTIVE is the opacity of an
156 active frame and INACTIVE is the opactity of non-active frames.
158 The variable `frame-alpha-lower-limit' defines a lower bound for the
159 opacity; the default is 20.
161 ** Internationalization changes
163 *** The Emacs character set is now a superset of Unicode.
164 (It has about four times the code space, which should be plenty).
166 The internal encoding used for buffers and strings is now
167 Unicode-based and called `utf-8-emacs'. This encoding is backwards
168 compatible with Unicode's UTF-8 encoding. The internal encoding
169 previously used by Emacs, `emacs-mule', is still available.
171 During byte-compilation, Emacs 23 uses `utf-8-emacs' to write files.
172 As a result, byte-compiled files containing non-ASCII characters can't
173 be read by earlier versions of Emacs. Files compiled by Emacs 20, 21,
174 or 22 are loaded correctly as emacs-mule (whether or not they contain
175 multibyte characters). This takes somewhat more time, so it may be
176 worth recompiling existing .elc files which don't need to be shared
179 *** There are new coding systems/aliases; see M-x list-coding-systems.
181 *** There is a new charset implementation with many new charsets.
182 See M-x list-character-sets. New charsets can be defined conveniently
183 as tables of unicodes.
185 **** The dimension of a charset is now 1, 2, 3, or 4, and the size of
186 each dimension is no longer limited to 94 or 96.
188 **** A dynamic charset priority list is used to infer the charset of
189 characters for display.
191 *** There are new language environments for Chinese-GBK,
192 Chinese-GB18030, Khmer, Bengali, Punjabi, Gujarati, Oriya, Telugu,
193 Sinhala, and TaiViet.
195 *** The minor modes unify-8859-on-encoding-mode and
196 unify-8859-on-decoding-mode are obsolete.
198 *** `ucs-insert' is bound to `C-x 8 RET' and in addition to hex numbers
199 accepts numbers in hash notation (e.g. #o21430 for octal, or #10r8984 for
200 decimal). It also accepts Unicode character names with completion.
202 *** The `cyrillic-translit' input method supports many new characters.
203 Common typographical characters available from Unicode were added to
204 `cyrillic-translit': punctuation marks, accented characters, fractions,
207 ** Emacs now supports serial port access on GNU/Linux, Unix, and
208 Windows. The new command `serial-term' starts an interactive terminal
209 on a serial port. The serial port can be configured at runtime with
210 the mode-line mouse menu.
214 *** In the Options menu, the "Set Default Font" item applies the
215 selected font to the `default' face on all frames, not just the
216 current frame. Furthermore, if Emacs is compiled with both GTK and
217 Fontconfig support, the "Set Default Font" item uses the GTK font
218 selection dialog instead of an Emacs pop-up menu.
220 *** The font setting chosen by "Set Default Font" is saved if the
221 "Save Options" item is used.
223 *** The Tools menu contains a new Encryption/Decryption submenu.
224 This contains commands provided by EasyPG, the newly-included
225 interface to GnuPG (see New Modes and Packages).
227 *** In the Options menu, the "Truncate Long Lines in the Buffer" entry
228 has been replaced with a submenu offering three different ways to
229 handle long lines: truncation, continuation at the window edge, and
230 the new word wrapping behavior (see Editing Changes, below).
232 *** Improvements to menus for major and minor modes
233 More major and minor modes now have a mode specific menu, and existing
234 mode menus have been improved to include more functionality.
238 *** The mode-line displays a `@', instead of `-', if the
239 default-directory for the current buffer is on a remote machine.
241 *** The mode-line displays a mode menu when mouse-1 is clicked on a
242 minor mode, in the same way as it already did for major modes.
244 *** The `mode-line-emphasis' face is used to highlight certain
245 mode-line information (e.g. waiting for a VC command to finish).
247 *** The mode-line tooltips have been improved to provide more details.
249 *** The VC, line/colum number and minor mode indicators on the mode
250 line are now interactive: mouse-1 can be used on them to pop up a menu.
252 ** File deletion can make use of the Recycle Bin or system Trash folder.
253 Set `delete-by-moving-to-trash' non-nil to use this. Deleted files
254 and directories will then be sent to the Recyle Bin on Windows, and
255 to `trash-directory' on other systems.
257 ** Directory-local variables can now be defined.
258 By default, Emacs looks in .dir-settings.el for directory-local
259 variables. For more information, see `set-directory-project' and
260 `define-project-bindings'.
262 ** Emacs can now use `auth-source' for authentication.
263 `smtpmail' and `url' (Tramp and Gnus also) use `auth-source' to obtain
264 login names and passwords. The match, if found, is reported
265 in *Messages* with the password blanked out.
267 ** `where-is-preferred-modifier' can specify your favorite modifier.
270 * Startup Changes in Emacs 23.1
273 ** The option `inhibit-startup-screen' (with aliases to old names
274 `inhibit-splash-screen' and `inhibit-startup-message') doesn't inhibit
275 display of the initial message in the *scratch* buffer. If you don't
276 want to display the initial message in the *scratch* buffer at startup,
277 you can set the option `initial-scratch-message' to nil.
279 ** New user option `initial-buffer-choice' specifies what to display
280 after starting Emacs: startup screen, *scratch* buffer, visiting a
283 ** New alias `argv' for `command-line-args-left'
284 This is a convenience alias, so that one can write `(pop argv)'
285 inside of --eval command line arguments in order to access
288 ** The abbrev file is no longer read at startup in batch mode.
290 ** Emacs now supports invocation by an X session manager.
291 It can save a session and restore it later. See the documentation of
292 the functions `emacs-session-save' and `emacs-session-restore'.
293 (Actually, this feature was introduced with Emacs 22, but it was not
296 * Incompatible Editing Changes in Emacs 23.1
298 ** In Dired, `dired-flag-garbage-files' is rebound from `&' to `%&'
299 on the regexp command prefix map.
302 ** In Dired-x, all command guesses for ! are now added to the default
303 list accessible by M-n instead of pushing all guesses temporarily into
307 ** In Isearch mode, a special case of typing `C-w' at the beginning of
308 the minibuffer that toggles word search (i.e. using key sequences
309 `C-s RET C-w' or `C-s M-e C-w') is obsolete. You can use the global key
310 `M-s w' to start word search, or type `M-s w' in Isearch mode to
313 ** In Text mode, `center-line' and `center-paragraph' are rebound
314 from `M-s' and `M-S' to global keys `M-o M-s' and `M-o M-S' on the
315 global prefix map `M-o' intended for such formatting commands.
318 ** The following input methods were removed in Emacs 22.2, but this was
319 not advertised: danish-alt-postfix, esperanto-alt-postfix,
320 finnish-alt-postfix, german-alt-postfix, icelandic-alt-postfix,
321 norwegian-alt-postfix, scandinavian-alt-postfix, spanish-alt-postfix,
322 and swedish-alt-postfix. Use the versions without "alt-", which are
326 * Editing Changes in Emacs 23.1
329 ** The C-n and C-p line-motion commands now move by screen lines,
330 taking continued lines and variable-width characters into account.
331 Setting `line-move-visual' to nil reverts this to the previous
332 behavior (motion by logical lines based on buffer contents alone).
335 ** C-x C-c now invokes `save-buffers-kill-terminal', and C-z now
336 invokes `suspend-frame'. This change is for compatibility with the
337 new multi-tty support (see `Improved X Window System support' above).
341 *** Transient Mark mode is now on by default.
343 *** mark-even-if-inactive now defaults to t
345 *** When Transient Mark mode is on, C-SPC C-SPC pushes a mark without
348 *** When Transient Mark mode is on, M-q now fills the region if the
349 region is active. Otherwise, it fills the current paragraph.
351 *** When Transient Mark mode is on, M-$ now checks spelling of the
352 region if the region is active. Otherwise, it checks spelling of the
355 *** When Transient Mark mode is on, TAB now indents the region if the
358 *** `use-empty-active-region' controls whether an empty active region
359 in Transient Mark mode should make commands operate on that empty
362 ** Temporarily active regions
364 *** The new variable shift-select-mode, non-nil by default, controls
365 shift-selection. When Shift Select mode is on, shift-translated
366 motion keys (e.g. S-left and S-down) activate and extend a temporary
367 region, similar to mouse-selection.
369 *** Temporarily active regions, created using shift-selection or
370 mouse-selection, are not necessarily deactivated in the next command.
371 They are only deactivated after point motion commands that are not
372 shift-translated, or after commands that would ordinarily deactivate
373 the mark in Transient Mark mode (e.g., any command that modifies the
376 ** Minibuffer and completion changes
378 *** When M-n in the minibuffer reaches the end of the list of defaults,
379 it adds the completion list to the end, so next M-n continues putting
380 completion items to the minibuffer. The same principle applies to
381 incremental search commands as well: C-s or C-M-s starts searching
382 the default values and after the end of defaults they continue
383 searching minibuffer completion items.
385 *** Minibuffer input of shell commands now comes with completion.
387 *** In the `C-x d' (Dired) prompt, typing M-n gives the visited file
388 name of the current buffer.
390 *** In the M-! (shell-command) prompt, M-n provides some default commands.
391 These are guessed using the file extension of the current file, based
392 on the file-handlers specified in the operating system's `mailcap'
393 file. The ! command in Dired (dired-do-shell-command) works
394 similarly, using the file displayed on the current line.
396 *** A list of regexp default values is available via M-n for `occur',
397 `keep-lines', `flush-lines' and `how-many'. This list includes the active
398 region in transient-mark-mode, the word under the cursor, the last Isearch
399 regexp, the last Isearch string and the last replacement regexp.
401 *** When enable-recursive-minibuffers is non-nil, operations which use
402 switch-to-buffer (such as C-x b and C-x C-f) do not fail any more when
403 used in a minibuffer or a dedicated window. Instead, they fallback on
404 using pop-to-buffer, which will use some other window. This change
405 has no effect when enable-recursive-minibuffers is nil (the default).
407 *** Isearch started in the minibuffer searches in the minibuffer history.
408 Reverse Isearch commands (C-r, C-M-r) search in previous minibuffer
409 history elements, and forward Isearch commands (C-s, C-M-s) search in
410 next history elements. When the reverse search reaches the first history
411 element, it wraps to the last history element, and the forward search
412 wraps to the first history element. When the search is terminated, the
413 history element containing the search string becomes the current.
415 *** The variable read-file-name-completion-ignore-case overrides
416 completion-ignore-case for file name completion.
418 *** The variable read-buffer-completion-ignore-case overrides
419 completion-ignore-case for buffer name completion.
421 *** `completion-styles' can be customized to choose your favorite
424 *** The default completion styles include a form of partial-completion.
426 *** The new command `minibuffer-force-complete' chooses one of the
427 possible completions, rather than stopping at the common prefix.
429 *** If `completion-auto-help' is `lazy', Emacs shows the completions
430 buffer only on the second attempt to complete. This was already
431 supported in `partial-completion-mode'.
435 *** S-down-mouse-1 now pops up a menu for changing the font and text
436 size of the default face in the current buffer. The face is changed
437 via face remapping (see below).
441 ** Primary selection changes
443 *** If `select-active-regions' is t, setting the mark automatically
444 makes the new region into the primary selection (for interaction with
445 other window applications). If you enable this, you might want to
446 bind `mouse-yank-primary' to Mouse-2.
448 *** You can disable kill ring commands from accessing the primary
449 selection by setting `x-select-enable-primary' to nil.
451 ** Continuation lines can now be wrapped at word boundaries
452 (word-wrapping). This is controlled by the new per-buffer variable
453 `word-wrap'. Word wrapping does not take place if continuation lines
454 are not shown, e.g. if truncate-lines is non-nil. The most convenient
455 way to enable word-wrapping is using the new minor mode Visual Line
456 mode; in addition to setting `word-wrap' to t, this rebinds some
457 editing commands to work on screen lines rather than text lines. See
458 New Modes and Packages, below.
460 ** Window management changes
462 *** truncate-partial-width-windows now accepts integer values, which
463 specify a minimum window width for partial-width windows, below which
464 lines are truncated. The default has been changed to 50.
466 *** The new command balance-windows-area balances windows both
467 vertically and horizontally.
469 *** pop-to-buffer now always sets input focus when the popped-to window
470 is on a different frame.
472 *** New functions window-parameters, window-parameter, set-window-parameter.
474 ** Miscellaneous changes:
477 *** C-l is bound to the new command recenter-top-bottom, rather than recenter.
478 This moves the current line to window center, top and bottom on
479 successive invokations.
481 *** scroll-preserve-screen-position also preserves the column position.
483 *** If `yank-pop-change-selection' is t, rotating the kill ring also
484 updates the selection or clipboard to the current yank, just as M-w
485 would do so with the text it copies to the kill ring.
488 *** C-M-% now shows replacement as it would look in the buffer, with
489 `\N' and `\&' substituted according to the match. Old behavior can be
490 restored by customizing `query-replace-show-replacement'.
492 *** The command shell prompts for the default directory, when it is
493 called with a prefix and the default directory is a remote file name.
494 This is because some file name handlers (like ange-ftp) are not able to
495 run processes remotely.
498 *** The new command kill-matching-buffers kills buffers whose name
501 *** The new commands `pp-macroexpand-expression' and
502 `pp-macroexpand-last-sexp' pretty-print macro expansions.
505 * New Modes and Packages in Emacs 23.1
507 ** FIXME add details of new packages imported from lisp/gnus.
508 [Maybe some information from doc/misc/gnus-coding.texi can be reused]
510 ** Auto Composition Mode is a minor mode that composes characters
511 automatically when they are displayed. It is globally on by default.
512 It uses `auto-composition-function' (default `auto-compose-chars').
514 ** Bubbles, a new game, is similar to SameGame.
516 ** bug-reference.el provides clickable links to bug reports.
518 ** dbus.el provides D-Bus language bindings.
519 D-Bus is an inter-process communication mechanism for applications
520 residing on the same host. See the manual for details.
522 ** Doc View mode allows viewing of PDF, PostScript and DVI documents.
523 One can also search for a regular expression in the document. For
524 details, see the commentary in doc-view.el.
526 PDF and DVI files are now opened in Doc View mode by default.
528 In Postcript mode, C-c C-c launches Doc View minor mode for viewing
531 ** EasyPG provides an interface to the GNU Privacy Guard (GnuPG).
532 It includes a GnuPG keyring browser, cryptographic operations on
533 regions and files, and automatic encryption of *.gpg files. For
534 details, see the EasyPG Assistant User's Manual.
536 ** json.el is a library for parsing and generating JSON
537 (JavaScript Object Notation), a lightweight data-interchange format.
539 ** linum.el is a new minor mode to display line numbers for the
542 ** mairix.el is an interface to mairix, a free tool for indexing and
543 searching locally stored mail. It allows you to query mairix and
544 display the search results with Rmail, Gnus and VM. Note that there
545 is an existing Gnus back end, nnmairix.el, which should be used with
548 ** minibuffer-depth-indicate-mode shows the minibuffer depth in the prompt.
551 This is a new mode for editing XML documents. It allows a schema to
552 be associated with the XML document being edited, using Relax NG as
553 the schema language. The schema is used to provide two key features:
555 *** Continuous validation. nXML validates as you type, highlighting
556 any invalid parts of your document.
558 *** Completion. nXML can assist you in entering an element name,
559 attribute name or data value by using information about what is
560 allowed by the schema in that context.
562 ** proced.el provides a Dired-like interface for operating on processes.
563 Proced makes an Emacs buffer containing a listing of the current
564 processes (using ps(1)). You can use the normal Emacs commands to
565 move around in this buffer, and special Proced commands to operate on
566 the processes listed.
568 ** Remember Mode is a mode for jotting down things to remember.
569 Notes can be saved to a Diary file. For details, see the Remember
572 ** RST mode is a major mode for editing ReSTructured-Text files.
575 ** Visual Line mode provides support for editing by visual lines.
576 It turns on word-wrapping in the current buffer, and rebinds C-a, C-e,
577 and C-k to commands that operate by visual lines instead of logical
578 lines. This is a more reliable replacement for longlines-mode.
579 This can also be turned on using the menu bar, via
580 Options -> Line Wrapping in this Buffer -> Word Wrap
582 ** xesam.el is an implementation of Xesam, an interface to (desktop)
583 search engines like Beagle, Strigi, and Tracker. The Xesam API
584 requires D-Bus for communication.
586 ** zeroconf.el offers service discovery and service publishing
587 interfaces according to the zeroconf specification. It communicates
588 with Avahi, a zeroconf implementation, via D-Bus messages on systems
589 which have installed this software.
591 ** There is a new `whitespace' package.
592 (The pre-existing one has been renamed to `old-whitespace'.)
593 Now, besides reporting bogus blanks, the whitespace package has a
594 minor mode and a global minor mode to visualize blanks (TAB, (HARD)
595 SPACE and NEWLINE). The visualization is made via faces and/or display
596 table. It can also indicate lines that extend beyond a given column,
597 trailing blanks, and empty lines at the start or end of a buffer.
598 See `whitespace-style' for more details. The `whitespace-action' option
599 specifies what to do when a buffer is visited, killed, or written.
602 * Changes in Specialized Modes and Packages in Emacs 23.1
604 ** Abbrev has been rewritten in Elisp and extended with more flexibility.
605 *** New functions: abbrev-get, abbrev-put, abbrev-table-get, abbrev-table-put,
606 abbrev-table-p, abbrev-insert, abbrev-table-menu.
607 *** Special hook `abbrev-expand-functions' obsoletes `pre-abbrev-expand-hook'.
608 *** `make-abbrev-table', `define-abbrev', `define-abbrev-table' all take
609 extra arguments for arbitrary properties.
610 *** New variable `abbrev-minor-mode-table-alist'.
611 *** `local-abbrev-table' can hold a list of abbrev-tables.
612 *** Abbrevs have now the following special properties:
613 `:count', `:system', `:enable-function', `:case-fixed'.
614 *** Abbrev-tables have now the following special properties:
615 `:parents', `:case-fixed', `:enable-function', `:regexp',
616 `abbrev-table-modiff'.
619 *** `apropos-library' describes the elements defined in a given library.
620 *** Set `apropos-compact-layout' is you want a more compact (but wider) layout.
622 ** Archive Mode has basic support to browse Rar archives.
626 *** New command `bibtex-initialize' (re)initializes BibTeX buffers.
628 *** New `bibtex-entry-format' options `whitespace', `braces', and
629 `string', disabled by default.
631 *** New variable `bibtex-cite-matcher-alist' contains rules to
632 identify cited keys in BibTeX entries, used by `bibtex-find-crossref'.
634 *** Command `bibtex-url' allows multiple URLs per entry.
636 ** Calendar and diary
639 *** There is a new date style, `iso', essentially year/month/day.
640 The variable `european-calendar-style' is obsolete - use `calendar-date-style'.
641 Similarly, the commands `american-calendar' and `european-calendar'
642 should be replaced by `calendar-set-date-style'.
645 *** The calendar namespace has been rationalized.
646 All functions and variables now begin with a `calendar-', `diary-', or
647 `holiday-' prefix. The various calendar systems have secondary
648 prefixes, eg `calendar-french-'. The old names you are likely to use
649 directly still exist, for the time being, as aliases, but please start
653 *** The whitespace in the calendar layout can be customized.
655 calendar-left-margin, calendar-intermonth-spacing, calendar-column-width,
656 calendar-day-header-width, and calendar-day-digit-width.
659 *** Text (e.g. ISO weeks) can be displayed between the calendar months.
660 See the variables calendar-intermonth-header and calendar-intermonth-text.
663 *** The function `holiday-chinese' computes holidays on the Chinese calendar.
664 It has been used to add items to the list `holiday-oriental-holidays'.
667 *** `diary-remind' accepts a negative number -DAYS as a shorthand for
668 the list (1 2 ... DAYS).
672 *** The new command C-c C-f (change-log-find-file) finds the file
673 associated with the current log entry.
675 *** The new command C-c C-c (change-log-goto-source) goes to the
676 source code associated with a log entry.
678 ** Compile and grep modes
680 *** The mode-line entry for the *compilation* and *grep* buffer is color coded.
681 It has different colors for to show that: (a) the command is still
682 running, (b) successful completion, (c) error.
684 *** compilation-auto-jump-to-first-error tells `compile' to jump to
685 the first error encountered during compilations.
687 *** The `cc' alias for C++ files in `grep-file-aliases' has been
688 improved. `hh' can be used to match C++ header files and `cchh' both
689 C++ sources and headers.
693 *** You can specify your copyright holders' names.
694 Only copyright lines with holders matching `copyright-names-regexp' are
695 considered for update.
697 *** Copyrights can be at the end of the buffer.
698 This is controlled by `copyright-at-end-flag' (used by, e.g., change-log-mode).
702 *** defcustom accepts new keyword arguments, `:safe' and `:risky', which
703 set a variable's `safe-local-variable' and `risky-local-variable' property.
707 *** diff-refine-hunk highlights word-level details of changes in a diff hunk.
708 It's used automatically as you move through hunks, see
709 diff-auto-refine-mode. It is bound to `C-c C-b'.
711 *** diff-add-change-log-entries-other-window iterates through the diff
712 buffer and tries to create ChangeLog entries for each change.
713 It is bound to `C-x 4 A'.
715 *** The new function `diff-show-trailing-whitespaces' shows
716 trailing whitespace problems in the modified lines of a diff buffer.
720 *** In Dired, C-x C-q now runs the command wdired-change-to-wdired-mode,
721 and C-x C-q in wdired-mode exits it with asking a question about
724 *** `&' runs the command `dired-do-async-shell-command' that executes
725 the command asynchronously without the need to manually add ampersand
726 to the end of the command. Its output appears in the buffer `*Async Shell
729 *** `M-s f C-s' and `M-s f M-C-s' run Isearch that matches only at file names.
730 When a new user option `dired-isearch-filenames' is non-nil, then even
731 ordinary Isearch started with `C-s' and `C-M-s' matches only at file names
732 in the Dired buffer. You can toggle file names matching on or off
733 by typing `M-s f' in Isearch mode.
735 *** `M-s a C-s' and `M-s a M-C-s' run multi-file Isearch on the marked files.
736 They visit the first marked file in the sequence and display the usual Isearch
737 prompt for a string or a regexp where all Isearch commands are available.
739 *** `Q' in Dired provides two new keys for multi-file replacement.
740 The upper case key `Y' replaces all remaining matches in all remaining files
741 with no more questions. The upper case key `N' stops doing replacements
742 in the current file and skips to the next file. These multi-file keys
743 are available for all commands that use `tags-query-replace'
744 including `dired-do-query-replace-regexp', `vc-dir-query-replace-regexp',
745 `reftex-query-replace-document'.
749 *** The line length of fixed-form Fortran is not fixed at 72 any more.
750 Customize the variable `fortran-line-length' to change it.
753 *** In Fortran mode, M-; is now bound to the standard comment-dwim,
754 rather than fortran-indent-comment.
757 *** (The increasingly misnamed) F90 mode supports Fortran 2003 syntax.
761 *** The Gnus package has been updated
762 There are many news features, bug fixes and improvements; see the file
763 GNUS-NEWS or the node "No Gnus" in the Gnus manual for details.
765 *** In Emacs 23, Gnus uses Emacs' new internal coding system `utf-8-emacs' for
766 saving articles drafts and ~/.newsrc.eld. These file may not be read
767 correctly in Emacs 22 and below. If you want to Gnus across different Emacs
768 versions, you may set `mm-auto-save-coding-system' to `emacs-mule'.
770 *** Password are consistently loaded through `auth-source'
771 Gnus can use `auth-source' for POP and IMAP passwords. Also see that
772 `smtpmail' and `url' support `auth-source' for SMTP and HTTP/HTTPS/RSS
773 authentication respectively.
776 *** New macro `with-help-window' should set up help windows better
777 than `with-output-to-temp-buffer' with `print-help-return-message'.
779 *** New option `help-window-select' permits to customize whether help
780 window shall be automatically selected when invoking help.
782 *** New variable `help-window-point-marker' permits to specify new
783 position of point in help window (for example in `view-lossage').
787 *** New command `isearch-forward-word' bound globally to `M-s w' starts
788 incremental word search. New command `isearch-toggle-word' bound to the
789 same key `M-s w' in Isearch mode toggles word searching on or off
790 while Isearch is active.
792 *** New command `isearch-highlight-regexp' bound to `M-s h r' in Isearch
793 mode runs `highlight-regexp' (`hi-lock-face-buffer') with the current
794 search string as its regexp argument. The same key `M-s h r' and
795 other keys on the `M-s h' prefix are bound globally to the command
796 `highlight-regexp' and other hi-lock commands.
798 *** New command `isearch-occur' bound to `M-s o' in Isearch mode
799 runs `occur' with the current search string. The same key `M-s o'
800 is bound globally to the command `occur'.
802 *** Isearch can now search through multiple ChangeLog files.
803 When running Isearch in a ChangeLog file, if the search fails,
804 then another C-s tries searching the previous ChangeLog,
805 if there is one (e.g. go from ChangeLog to ChangeLog.12).
806 This is enabled if multi-isearch-search is non-nil.
808 *** Two new commands to start Isearch on a list of marked buffers
809 for buff-menu.el and ibuffer.el are bound to the keys `M-s a C-s' and
812 *** The part of an Isearch that failed to match is highlighted in
815 *** `C-h C-h' in Isearch mode displays isearch-specific Help screen,
816 `C-h b' displays all Isearch key bindings, `C-h k' displays the full
817 documentation of the given Isearch key sequence, `C-h m' displays
818 documentation of Isearch mode. All the rest Help commands exit Isearch mode
819 and execute their global definitions.
821 *** When started in the minibuffer, Isearch searches in the minibuffer
822 history. See `Minibuffer changes', above.
827 *** Upgraded to MH-E version 8.1. See MH-E-NEWS for details.
830 *** The file etc/emacs.py now supports both Python 2 and 3, meaning
831 that either version can be used as inferior Python by python.el.
833 *** Python mode now has `pdbtrack' functionality. When using pdb to
834 debug a Python program, pdbtrack notices the pdb prompt and displays
835 the source file and line that the program is stopped at, much the same
836 way as gud-mode does for debugging C programs with gdb.
840 *** The default value of `recentf-keep' prevents from checking of
841 remote files, if there is no established connection to the
842 corresponding remote host.
846 *** New option latex-indent-within-escaped-parens
847 permits to customize indentation of LaTeX environments delimited
852 *** If the gpm mouse server is running and t-mouse-mode is enabled,
853 Emacs uses a Unix socket in a GNU/Linux console to talk to server,
854 rather than faking events using the client program mev. This C level
855 approach provides mouse highlighting and help echoing in the
861 *** New connection methods.
862 The new methods "plinkx", "plink2", "psftp", "sftp" and "fish" have
863 been introduced. There are also new so-called gateway methods
864 "tunnel" and "socks".
866 *** Multihop syntax has been removed.
867 The pseudo-method "multi" has been removed. Instead of, multi hops
868 can be specified by the new variable `tramp-default-proxies-alist'.
870 *** More default settings.
871 Default values can be set via the variables `tramp-default-user',
872 `tramp-default-user-alist' and `tramp-default-host'.
874 *** Connection information is cached.
875 In order to reduce connection setup, information about used
876 connections are kept persistent in a file. The name of this file is
877 defined in the variable `tramp-persistency-file-name'.
879 *** Control of remote processes.
880 Running processes on a remote host can be controlled by settings in
881 `tramp-remote-path' and `tramp-remote-process-environment'.
883 *** Success of remote copy is checked.
884 When the variable `file-precious-flag' is set, the success of a remote
885 file copy is checked via the file's checksum.
887 *** Passwords can be read from an authentification file.
888 Tramp uses the package `auth-source' to read passwords from a file, if
891 ** VC and related modes
893 *** VC now supports applying VC operations to a set of files at a time.
894 This enables VC to work much more effectively with changeset-oriented
895 version-control systems such as Subversion, GNU Arch, Mercurial, Git
896 and Bzr. VC will now pass a multiple-file commit to these systems as
899 *** vc-dir is a new command that displays file names and their VC
900 status. It allows to apply various VC operations to a file, a
901 directory or a set of files/directories.
903 *** Clicking on the VC mode-line entry now pops the VC menu.
905 *** The VC mode-line entry now has a tooltip that explains the VC file status.
907 *** In VC Annotate mode, for VC systems that support changesets, you can
908 see the diff for the whole changeset (not only for the current file)
909 by typing the D key. Using the "Show changeset diff of revision at
910 line" menu entry does the same thing.
912 *** In VC Annotate mode, you can type v to toggle the annotation visibility.
914 *** In VC Annotate mode, you can type f to show the file revision on
917 *** Asynchronous VC commands display [Waiting...] in the mode-line
918 of the corresponding buffer as long as the asynchronous process is
921 *** Log entries can be modified using the key "e" in log-view.
922 For now only CVS, RCS, SCCS and SVN support this functionality.
923 This is done by the `modify-change-comment' backend function.
925 *** In log-view-mode, for VC systems that support changesets, you can
926 see the diff for the whole changeset (not only for the current file)
927 by typing the D key or using the "Changeset Diff" menu entry.
929 *** In Log Edit mode, C-c C-d now shows the diff for the files involved.
931 *** vc-git supports the "git grep" command.
933 *** VC Support for Meta-CVS has been removed for lack of maintainer able
934 to update it to the new VC.
938 *** comint-mode uses `start-file-process' now (see Lisp Changes).
939 If `default-directory' is a remote file name, subprocesses are started
940 on the corresponding remote system.
942 *** Eldoc highlights the function argument under point
943 with the face `eldoc-highlight-function-argument'.
945 *** In Etags, the --members option is now the default.
946 Use --no-members if you want the old default behavior of not tagging
947 struct members in C, members variables in C++ and variables in PHP.
949 *** The `gdb' command only works with the graphical interface now.
950 Use `gud-gdb' if you want the (old) text command mode.
952 *** goto-address.el provides two new minor modes, goto-address-mode and
953 goto-address-prog-mode, which buttonize URLS and email addresses.
955 *** The new command `eshell/info' runs info in an eshell buffer.
957 *** The new variable `ffap-rfc-directories' specifies a list of local
958 directories in which `ffap-rfc' will first search for RFCs.
960 *** hide-ifdef-mode allows shadowing ifdef-blocks instead of hiding them.
961 See option `hide-ifdef-shadow' and function `hide-ifdef-toggle-shadowing'.
963 *** `icomplete-prospects-height' now supercedes `icomplete-prospects-length'.
965 *** Info displays breadcrumbs in the header of the page.
966 See Info-breadcrumbs-depth to control it.
968 *** net-utils has an `iwconfig' command, similar to the existing `ifconfig'.
969 It is used to configure wireless interfaces.
971 *** The pcmpl-unix package supports hostname completion for ssh and scp.
973 *** sgml-electric-tag-pair-mode lets you simultaneously edit matched tag pairs.
975 *** smerge-refine highlights word-level details of changes in conflict.
976 It's used automatically as you move through conflicts, see
977 smerge-auto-refine-mode.
979 *** talk.el has been extended for multiple tty support.
981 *** A new command `display-time-world' has been added to the Time
982 package. It creates a buffer with an updating time display using
985 *** The appearance of superscript and subscript in TeX is more customizable.
986 See the documentation of the variables: tex-fontify-script,
987 tex-font-script-display, tex-suscript-height-ratio, and
988 tex-suscript-height-minimum.
990 *** view-remove-frame-by-deleting is now by default t
991 since users found iconification of view-mode frames distracting.
993 *** WoMan tries to add locale-specific manual page directories to the
994 search path. This can be disabled by setting `woman-locale' to nil.
997 * Changes in Emacs 23.1 on non-free operating systems
999 ** Case is now considered significant in completion on MS-Windows.
1000 The default value of `completion-ignore-case' is now nil on
1001 MS-Windows, the same as it is for other operating systems. The
1002 variable doesn't apply to reading a file name -- in that case Emacs
1003 heeds `read-file-name-completion-ignore-case' instead.
1006 ** IPv6 is supported on MS-Windows.
1007 Emacs now supports IPv6 on Windows XP and later, and earlier versions
1008 of Windows with third party IPv6 stacks installed. In Emacs 22, IPv6 was
1009 supported on other platforms, but not on Windows due to using the winsock
1010 1.1 header file, even though Emacs was linking to the winsock 2 library.
1013 ** Busy cursor (hourglass) now displays on MS-Windows.
1014 When Emacs is busy, an hourglass mouse cursor is displayed on Windows.
1015 In Emacs 22 only X supported the busy cursor.
1018 ** Battery status is available on MS-Windows
1019 Emacs can now display the battery status in the mode-line when enabled with
1020 display-battery-mode or from the Options menu. More verbose battery
1021 information is also available with the command `battery'. In Emacs 22
1022 battery status was supported only on GNU/Linux and Mac.
1024 ** More keys available on MS-Windows.
1025 Keys normally associated with IMEs, and some exotic keys not normally found
1026 on standard keyboards have been given names so they can be bound to functions
1027 inside Emacs. If there are keys on your keyboard that have not been exposed
1028 to Emacs in the past, try C-h k to see if they are available now.
1030 Emacs can now bind functions to the extra buttons for media player and
1031 browser control present on some keyboards. These buttons are disabled
1032 by default, since enabling them prevents their system-wide use when
1033 Emacs has focus. To enable them, set the variable
1034 w32-pass-multimedia-buttons to nil. See the doc string of that variable
1035 for the list of extra keys that are available.
1037 ** BDF fonts no longer supported on MS-Windows.
1038 The font backend was completely rewritten for this release. The focus
1039 on Windows has been getting acceptable performance and full unicode
1040 support, including complex script shaping for native Windows fonts. A
1041 rewrite of the BDF font support has not happened due to lack of time
1042 and developers. If demand still exists for such a backend even with
1043 the improved language support for native Windows fonts, future
1044 development in this direction will most likely be based on the
1045 freetype library, giving access to a wider range of font formats.
1048 * Incompatible Lisp Changes in Emacs 23.1
1051 ** Variables cannot be both buffer-local and frame-local any more.
1054 ** `functionp' returns nil for special forms.
1055 I.e., it only returns t for objects that can be passed to `funcall'.
1058 ** The behavior of map-char-table has changed. It may call the
1059 specified function with a cons (FROM . TO) as a key if characters in
1060 that range have the same value.
1064 *** The function `dired-call-process' has been removed.
1066 *** The multibyteness of process filters is now determined by the
1067 coding-system used for decoding. The functions
1068 `process-filter-multibyte-p' and `set-process-filter-multibyte' are
1072 ** The variable `byte-compile-warnings' can now be a list starting with `not',
1073 meaning to disable the specified warnings. The meaning of this list
1074 may therefore be the reverse of what you expect (of course, this is
1075 only an issue if you make use of the new `not' syntax). Rather than
1076 checking/manipulating elements directly, use the new functions
1077 `byte-compile-warning-enabled-p', `byte-compile-disable-warning', and
1078 `byte-compile-enable-warning.'
1081 ** `mode-name' is no longer guaranteed to be a string.
1082 Use `(format-mode-line mode-name)' to ensure a string value.
1084 ** Internationalization changes
1086 *** The value of the function `charset-id' is now always 0.
1088 *** The functions `register-char-codings' and `coding-system-spec'
1091 *** The cpXXX coding systems are now supported automatically.
1092 The functions cp-...-codepage, which you had to use in Emacs 22 to
1093 enable support for these coding systems, have been deleted.
1095 *** The following features have been removed. They were used for
1096 displaying various scripts with specific fonts, and are no longer
1097 needed now that OpenType font support is available:
1099 **** `devanagari' and `devan-util', and all associated devanagari-* and
1100 dev-* functions and variables (formerly used for Devanagari script).
1102 **** `kannada' and `knd-util', and all associated kannada-* and knd-*
1103 functions and variables (formerly used for Kannada script).
1105 **** `malayalam' and `mlm-util', and all associated malayalam-* and
1106 mlm-* functions and variables (formerly used for Malayalam script).
1108 **** `tamil' and `tml-util, and all associated tamil-* and tml-*
1109 functions and variables (formerly used for Tamil script).
1112 * Lisp Changes in Emacs 23.1
1115 ** New primitives `list-system-processes' and `system-process-attributes'
1116 let Lisp programs access the processes that are running on the local
1117 machine. See the doc strings of these functions for more details.
1118 Not all platforms support accessing this information; on those that
1119 don't, these primitives will return nil.
1122 ** New variable `user-emacs-directory'.
1123 Use this instead of "~/.emacs.d".
1126 ** If a local hook function has a non-nil `permanent-local-hook'
1127 property, `kill-all-local-variables' does not remove it from the local
1128 value of the hook variable; it remains even if you change major modes.
1131 ** `frame-inherited-parameters' lets new frames inherit parameters from
1135 ** New keymap `input-decode-map' overrides like key-translation-map, but
1136 applies before function-key-map. Also it is terminal-local contrary to
1137 key-translation-map. Terminal-specific key-sequences are generally added to
1138 this map rather than to function-key-map now.
1141 ** `ignore-errors' is now a standard macro (does not require the CL package).
1144 ** `interprogram-paste-function' can now return one string or a list
1145 of strings. In the latter case, Emacs puts the second and following
1146 strings on the kill ring.
1149 ** In `condition-case', a handler can specify "let the debugger run first".
1150 You do this by writing `debug' in the list of conditions to be handled,
1155 ((debug error) nil))
1158 ** clone-indirect-buffer now runs the clone-indirect-buffer-hook.
1161 ** `beginning-of-defun-function' now takes one argument, the count
1162 given to `beginning-of-defun'.
1165 ** `file-remote-p' has new optional parameters IDENTIFICATION and CONNECTED.
1166 IDENTIFICATION specifies which part of the remote identifier has to be
1167 returned. With CONNECTED passed non-nil, it is checked whether a
1168 remote connection has been established already.
1171 ** The new macro `declare-function' suppresses compiler warnings about
1172 undefined functions.
1174 ** Changes to interactive function handling
1177 *** The new interactive spec code ^ says to first call
1178 handle-shift-selection if shift-select-mode is non-nil, before reading
1179 the command arguments. This is used for shift-selection (see above).
1182 *** Built-in functions can now have an interactive specification that
1183 is not a prompt string. If the `intspec' parameter of a `DEFUN'
1184 starts with a `(', the string is evaluated as a Lisp form.
1187 *** The interactive-form of a function can be added post-facto via the
1188 `interactive-form' symbol property. Mostly useful to add complex
1189 interactive forms to subroutines.
1194 *** Commands should use `use-region-p' to test whether there is
1195 an active region that they should operate on.
1197 *** `region-active-p' returns non-nil when Transient Mark mode is
1198 enabled and there is an active region. This is NOT the best function
1199 to use to test whether a command should operate on the region instead
1200 of the usual behavior -- for that, use `use-region-p'.
1203 *** If a command sets `transient-mark-mode' to (only . OLDVAL), that
1204 means to activate transient-mark-mode temporarily, until the next
1205 unshifted point motion command or mark deactivation. Afterwards,
1206 reset transient-mark-mode to the value OLDVAL. The values `only' and
1207 `identity', introduced in Emacs 22, are now deprecated.
1209 ** Emacs session information
1212 *** The new variables `before-init-time' and `after-init-time' record the
1213 value of `current-time' before and after Emacs loads the init files.
1216 *** The new function `emacs-uptime' returns the uptime of an Emacs instance.
1219 *** The new function `emacs-init-time' returns the duration of the
1220 Emacs initialization.
1222 ** Changes affecting display-buffer
1225 *** New value nil for split-height-threshold inhibits vertical splitting
1226 unless there's no other window.
1229 *** New option split-width-threshold controls horizontal splitting.
1232 *** A window can be split horizontally even when it's not full-width.
1235 *** New option split-window-preferred-function can be set to a function
1236 to override the default splitting mechanism of display-buffer.
1239 *** If pop-up-frames has the value `graphic-only', display-buffer only
1240 makes a separate frame on graphic displays.
1242 ** Minibuffer and completion changes
1244 *** A list of default values can be specified for the DEFAULT argument of
1245 functions `read-from-minibuffer', `read-string', `read-command',
1246 `read-variable', `read-buffer', `completing-read'. Elements of this list
1247 are available for inserting into the minibuffer by typing `M-n'.
1248 For empty input these functions return the first element of this list.
1251 *** New function `read-regexp' uses the regexp history and some useful
1252 regexp defaults (string at point, last Isearch/replacement regexp/string)
1253 via M-n when reading a regexp in the minibuffer.
1256 *** minibuffer-local-must-match-filename-map is now named
1257 minibuffer-local-filename-must-match-map.
1259 *** `all-completions' may now return the base size in the last cdr.
1260 Since this means the returned list is not properly nil-terminated, this
1261 is an incompatible change and is thus enabled by the new variable
1262 completion-all-completions-with-base-size.
1265 *** The `require-match' argument to `completing-read' accepts a new value
1268 ** Search and replacement changes
1270 *** The regexp form \(?<num>:<regexp>\) specifies the group number explicitly.
1272 *** New function `match-substitute-replacement' returns the result of
1273 `replace-match' without actually using it in the buffer.
1276 *** The new variable `replace-search-function' determines the function
1277 to use for searching in query-replace and replace-string. The
1278 function it specifies is called by `perform-replace' when its 4th
1282 *** The new variable `replace-re-search-function' determines the
1283 function to use for searching in `query-replace-regexp',
1284 `replace-regexp', `query-replace-regexp-eval', and
1285 `map-query-replace-regexp'. The function it specifies is called by
1286 `perform-replace' when its 4th argument is non-nil.
1289 *** New keymap `search-map' bound to `M-s' provides global bindings
1290 for search related commands.
1293 *** New keymap `multi-query-replace-map' contains additonal keys bound
1294 to `automatic-all' and `exit-current' for multi-buffer interactive replacement.
1297 *** The variable `inhibit-changing-match-data', if non-nil, prevents
1298 the search and match primitives from changing the match data.
1301 *** New functions `word-search-forward-lax' and `word-search-backward-lax'.
1302 These are like `word-search-forward and `word-search-backward', except
1303 that the end of the search string need not match a word boundary,
1304 unless it ends in whitespace.
1306 ** File handling changes
1308 *** set-file-modes is now interactive and can take the mode value in
1309 symbolic notation thanks to auxiliary functions.
1311 *** If you set find-file-confirm-nonexistent-file to t, then C-x C-f
1312 requires confirmation before opening a non-existent file.
1316 *** The new function `start-file-process' is similar to `start-process',
1317 but obeys file handlers. The file handler is chosen based on
1318 `default-directory'. The functions `start-file-process-shell-command'
1319 and `process-file-shell-command' are also new; they call internally
1320 `start-file-process' and `process-file', respectively.
1322 *** The new function `process-lines' executes an external program and
1323 returns its output as a list of lines.
1325 ** Character code, representation, and charset changes.
1327 The character code space is now 0x0..0x3FFFFF with no gap.
1328 Characters of code 0x0..0x10FFFF are Unicode characters of the same code points.
1329 Characters of code 0x3FFF80..0x3FFFFF are raw 8-bit bytes.
1332 Generic characters no longer exist.
1334 In buffers and strings, characters are represented by UTF-8 byte
1335 sequences in a multibyte buffer/string.
1337 The concept of a charset has changed. A single character may belong
1338 to multiple charsets (e.g. a-grave, U+00E0, belongs to charsets
1339 unicode, iso-8859-1, iso-8859-3, etc).
1341 *** The functions `split-char' and `make-char' now accept up to 4
1342 positional codes instead of just 2.
1344 *** The functions `encode-char' and `decode-char' now accept any character sets.
1346 *** The function `define-charset' now accepts a completely different
1347 form of arguments (old-style arguments still work).
1349 *** The value of the function `char-charset' depends on the current
1350 priorities of charsets.
1352 *** The function get-char-code-property now accepts many Unicode base
1353 character properties. They are `name', `general-category',
1354 `canonical-combining-class', `bidi-class', `decomposition',
1355 `decimal-digit-value', `digit-value', `numeric-value', `mirrored',
1356 `old-name', `iso-10646-comment', `uppercase', `lowercase', and
1359 *** The functions `modify-syntax-entry' and `modify-category-entry' now
1360 accept a cons of characters as the first argument, and modify all
1361 entries in that range of characters.
1364 *** `translation-table-for-input' is now obsolete.
1368 **** `characterp' returns t if and only if the argument is a character.
1369 This replaces `char-valid-p', which is now obsolete.
1371 **** `max-char' returns the maximum character code (currently #x3FFFFF).
1373 **** `define-charset-alias' defines an alias of a charset.
1375 **** `set-charset-priority' sets priorities of charsets.
1377 **** `charset-priority-list' returns a prioritized list of charsets.
1379 **** `unibyte-string' makes a unibyte string from bytes.
1381 **** `define-char-code-property' defines a character code property.
1383 **** `char-code-property-description' returns the description string of
1384 a character code property.
1388 **** file-local-variables-alist stores an alist of file-local
1389 variables defined in the current buffer.
1391 **** `find-word-boundary-function-table' is a char-table of functions to
1392 search for a word boundary.
1394 **** `char-script-table' is a char-table of script names.
1396 **** `char-width-table' is a char-table of character widths.
1398 **** `print-charset-text-property' controls how to handle `charset' text
1399 property on printing a string.
1401 **** `printable-chars' is a char-table of printable characters.
1403 ** Code conversion changes
1405 *** The new function `define-coding-system' should be used to define a
1406 coding system instead of `make-coding-system' (which is now obsolete).
1408 *** The functions `encode-coding-region' and `decode-coding-region'
1409 have an optional 4th argument to specify where the result of
1410 conversion should go.
1412 *** The functions `encode-coding-string' and `decode-coding-string'
1413 have an optional 4th argument specifying a buffer to store the result
1416 *** The functions `set-coding-priority' and `make-coding-system' are obsolete.
1420 **** `with-coding-priority' executes Lisp code using the specified
1421 coding system priority order.
1423 **** `check-coding-systems-region' checks if the text in the region is
1424 encodable by the specified coding systems.
1426 **** `coding-system-aliases' returns a list of aliases of a coding system.
1428 **** `coding-system-charset-list' returns a list of charsets supported
1431 **** `coding-system-priority-list' returns a list of coding systems
1432 ordered by their priorities.
1434 **** `set-coding-system-priority' sets priorities of coding systems.
1436 ** There is a new input method, Robin, different from Quail.
1437 It has three functionalities:
1438 i) a simple input method (converts an ASCII sequence into a string).
1439 ii) converts an existing buffer substring into another string
1440 iii) reverse conversion (each character produced by a
1441 robin rule can hold the original ASCII sequence as a char-code-property)
1443 *** The new function `robin-define-package' defines a Robin package.
1445 *** The new function `robin-modify-package' modifies an existing Robin package.
1447 *** The new function `robin-use-package' starts using a Robin package
1450 *** The new function `string-to-unibyte' is like `string-as-unibyte'
1451 but signals an error if STRING contains a non-ASCII, non-eight-bit
1454 ** Changes related to the new font backend
1456 Which font backends to use can be specified by the X resource "FontBackend".
1457 For instance, to use both X core fonts and Xft fonts:
1459 Emacs.FontBackend: x,xft
1461 If this resource is not set, Emacs tries to use all font backends
1462 available on your graphic device.
1464 *** New frame parameter `font-backend' specifies a list of
1465 font-backends supported by the frame's graphic device. On X, they are
1466 currently `x' and `xft'.
1468 *** The function `set-fontset-font' now accepts a script name as the
1469 second argument, and has an optional 5th argument to control how to
1474 **** `fontp' checks if the argument is a font-spec or font-entity.
1476 **** `font-spec' creates a new font-spec object.
1478 **** `font-get' returns a font property value.
1480 **** `font-put' sets a font property value.
1482 **** `font-face-attributes' returns a plist of face attributes set by a font.
1484 **** `list-fonts' returns a list of font-entities matching a font spec.
1486 **** `font-font' returns the font-entity best matching the given font spec.
1488 **** `list-families' returns a list of family names of available fonts.
1490 **** `font-xlfd-name' returns an XLFD name of a given font spec, font
1491 entity, or font object.
1493 **** `clear-font-cache' clears all font caches.
1495 ** Changes related to multiple-terminal (multi-tty) support
1497 *** $TERM is now set to `dumb' for subprocesses. If you want to know the
1498 $TERM inherited by Emacs you will have to look inside initial-environment.
1500 *** $DISPLAY is now dynamically inherited from the frame's `display'.
1502 *** The `window-system' variable is now frame-local. The new
1503 `initial-window-system' variable contains the `window-system' value
1504 for the first frame. `window-system' is also now a function that
1505 takes a frame argument.
1507 *** The `keyboard-translate-table' variable and the terminal and
1508 keyboard coding systems are now terminal-local.
1510 *** You can specify a terminal device (`tty' parameter) and a terminal
1511 type (`tty-type' parameter) to `make-terminal-frame'.
1513 *** The function `make-frame-on-display' now works during a tty
1514 session, and `make-frame-on-tty' works during a graphical session.
1516 *** A new data type for terminals with functions: `get-device-terminal',
1517 `terminal-parameters', `terminal-parameter', `set-terminal-parameter'.
1519 *** Function key sequences are now mapped using `local-function-key-map',
1520 a new variable. This inherits from the global variable function-key-map,
1521 which is not used directly any more.
1525 **** before-hack-local-variables-hook is called after setting new
1526 variable file-local-variables-alist, and before actually applying the
1527 file-local variables.
1529 **** `suspend-tty-functions' and `resume-tty-functions' are called
1530 after a tty frame has been suspended or resumed, respectively. The
1531 functions are called with the terminal id of the frame being
1532 suspended/resumed as a parameter.
1534 **** The special hook `delete-terminal-functions' is called before
1535 deleting a terminal.
1541 **** `make-frame-on-tty' creates a new frame on another tty device.
1549 *** `initial-environment' holds the environment inherited from Emacs's parent.
1551 ** Redisplay changes
1553 *** For underlined characters, the distance between the underline and
1554 the baseline is controlled by a new variable, `underline-minimum-offset'.
1556 *** You can now pass the value of the `invisible' property to
1557 invisible-p to check whether it would cause the text to be invisible.
1558 Convenient when checking invisibility of text with no buffer position
1559 (e.g. in before/after-strings).
1561 *** `clear-image-cache' can be told to flush only images of a specific file.
1563 *** `vertical-motion' can now be given a goal column.
1564 It now accepts a cons cell (COLS . LINES) in its first argument, which
1565 says to stop, where possible, at a pixel x-position equal to COLS
1566 times the default column width.
1568 ** The Lisp interpreter now treats non-breaking space as whitespace.
1570 ** Miscellaneous new functions
1573 *** `format-seconds' converts a number of seconds into a readable
1574 string of days, hours, etc.
1576 *** `apply-partially' performs a "curried" application of a function.
1578 *** `read-shell-command' does what its name says, with completion. It
1579 uses the minibuffer-local-shell-command-map for that.
1581 *** `buffer-swap-text' swaps text between two buffers. This can be
1582 useful for modes such as tar-mode, archive-mode, RMAIL.
1584 *** `read-color' reads a color name using the minibuffer.
1586 *** `face-all-attributes' returns an alist describing all the basic
1587 attributes of a given face.
1589 *** `window-full-width-p' returns t if a window is as wide as its
1592 *** `split-string-and-unquote' does (what?)
1594 *** `combine-and-quote-strings' does (what?)
1596 *** `image-refresh' refreshes all images associated with a given image
1599 *** The two new functions `looking-at-p' and `string-match-p' can do
1600 the same matching as `looking-at' and `string-match' without changing
1603 *** The two new functions `make-serial-process' and
1604 `serial-process-configure' provide a Lisp interface to the new serial
1605 port support (see Emacs changes, above).
1607 ** Miscellaneous new variables
1609 *** `this-command-keys-shift-translated' is non-nil if the key
1610 sequence invoking the current command was found by shift-translation.
1612 *** `window-point-insertion-type' determines the insertion-type of the
1613 marker used for window-point.
1615 *** bookmark provides `bookmark-make-record-function' so special major
1616 modes like Info can teach bookmark.el how to save and restore the
1619 *** `next-error-recenter' specifies how next-error should recenter the
1620 visited source file. Its value can be a number (for example, 0 for
1621 top line, -1 for bottom line), or nil for no recentering.
1623 *** `fill-forward-paragraph-function' specifies which function the
1624 filling code should use to find paragraph boundaries.
1626 *** `custom-note-var-changed' tells Custom to treat the change in a
1627 certain variable as having been made within Custom.
1630 * New Packages for Lisp Programming in Emacs 23.1
1632 ** The new package avl-tree.el deals with the AVL tree data structure.
1635 ** The new package check-declare.el verifies the accuracy of
1636 declare-function macros (see Lisp Changes, above).
1638 ** find-cmd.el can build `find' commands using lisp syntax.
1640 ** The package misearch.el has been added. It allows Isearch to search
1641 through multiple buffers. A variable `multi-isearch-next-buffer-function'
1642 defines the function to call to get the next buffer to search in the series
1643 of multiple buffers. Top-level commands `multi-isearch-buffers',
1644 `multi-isearch-buffers-regexp', `multi-isearch-files' and
1645 `multi-isearch-files-regexp' accept a single argument that specifies
1646 a list of buffers/files to search for a string/regexp.
1648 ** The new major mode `special-mode' is intended as a parent for
1649 major modes such as those that set the "'mode-class 'special" property.
1652 ----------------------------------------------------------------------
1653 This file is part of GNU Emacs.
1655 GNU Emacs is free software: you can redistribute it and/or modify
1656 it under the terms of the GNU General Public License as published by
1657 the Free Software Foundation, either version 3 of the License, or
1658 (at your option) any later version.
1660 GNU Emacs is distributed in the hope that it will be useful,
1661 but WITHOUT ANY WARRANTY; without even the implied warranty of
1662 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1663 GNU General Public License for more details.
1665 You should have received a copy of the GNU General Public License
1666 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
1671 paragraph-separate: "[
\f]*$"
1674 arch-tag: e759449d-88b3-4de4-9900-3a6c3dfa23e2