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104 lines
3.6 KiB
Text
104 lines
3.6 KiB
Text
GNU Emacs NEWS -- history of user-visible changes. 2002-0705
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Copyright (C) 2002 Free Software Foundation, Inc.
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See the end for copying conditions.
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Please send Emacs bug reports to bug-gnu-emacs@gnu.org.
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For older news, see the file ONEWS
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Temporary note:
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+++ indicates that the appropriate manual has already been updated.
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--- means no change in the manuals is called for.
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When you add a new item, please add it without either +++ or ---
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so we will look at it
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* Changes in Emacs 22.1
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** The Emacs character set is now a superset of Unicode (it has about
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four times the code space, which should be plenty).
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The internal encoding used for buffers and strings is now
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Unicode-based and called `utf-8-emacs'. utf-8-emacs is backwards
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compatible with the UTF-8 encoding of Unicode. The `emacs-mule'
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coding system can still read and write data in the old internal
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encoding.
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There are still charsets which contain disjoint sets of characters
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where this is necessary or useful, especially for various Far Eastern
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sets which are problematic with Unicode.
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Since the internal encoding is also used by default for byte-compiled
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files -- i.e. the normal coding system for byte-compiled Lisp files is
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now utf-8-Emacs -- Lisp containing non-ASCII characters which is
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compiled by Emacs 22 can't be read by earlier versions of Emacs.
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Files compiled by Emacs 20 or 21 are loaded correctly as emacs-mule
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(whether or not they contain multibyte characters), which makes
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loading them somewhat slower than Emacs 22-compiled files. Thus it
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may be worth recompiling existing .elc files which don't need to be
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shared with older Emacsen.
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** There are assorted new coding systems/aliases -- see
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M-x list-coding-systems.
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** New charset implementation with many new charsets.
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See M-x list-character-sets. New charsets can be defined conveniently
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as tables of unicodes.
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The dimension of a charset is now 0, 1, 2, or 3, and the size of each
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dimension is no longer limited to 94 or 96.
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Generic characters no longer exist.
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A dynamic charset priority list is used to infer the charset of
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unicodes for display &c.
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** The following facilities are obsolete:
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Minor modes: unify-8859-on-encoding-mode, unify-8859-on-decoding-mode
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* Lisp changes in Emacs 22.1
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New functions: characterp, max-char, map-charset-chars,
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define-charset-alias, primary-charset, set-primary-charset,
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unify-charset, clear-charset-maps, charset-priority-list,
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set-charset-priority, define-coding-system,
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define-coding-system-alias, coding-system-aliases
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Changed functions: copy-sequence, decode-char, encode-char,
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set-fontset-font, new-fontset, modify-syntax-entry, define-charset,
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modify-category-entry
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Obsoleted: char-bytes, chars-in-region, set-coding-priority,
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char-valid-p
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* Incompatible Lisp changes
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Deleted functions: make-coding-system, register-char-codings,
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coding-system-spec
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** The character codes for characters from the
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eight-bit-control/eight-bit-graphic charsets aren't now in the range
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128-255.
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----------------------------------------------------------------------
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Copyright information:
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Copyright (C) 2002 Free Software Foundation, Inc.
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Permission is granted to anyone to make or distribute verbatim copies
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of this document as received, in any medium, provided that the
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copyright notice and this permission notice are preserved,
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thus giving the recipient permission to redistribute in turn.
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Permission is granted to distribute modified versions
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of this document, or of portions of it,
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under the above conditions, provided also that they
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carry prominent notices stating who last changed them.
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Local variables:
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mode: outline
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paragraph-separate: "[ ]*$"
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end:
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