[bpt/emacs.git] / README.unicode

                                                                   -*-text-*-

Problems, fixmes and other issues in the emacs-unicode branch
-------------------------------------------------------------

Notes by fx to record various things of variable importance.  handa
needs to check them -- don't take too seriously, especially with
regard to completeness.

_Do take seriously that you don't want this branch unless you're
actually working on it; you risk your data by actually using it._  If
you just want to edit Unicode and/or unify iso-8859 et al, see the
existing support and the extra stuff at
<URL:ftp://dlpx1.dl.ac.uk/fx/emacs/Mule>, mostly now in the CVS trunk.
(Editing support is mostly orthogonal to the internal representation.)

 * SINGLE_BYTE_CHAR_P returns true for Latin-1 characters, which has
   undesirable effects.

 * Rationalize character syntax and its relationship to the Unicode
   database.  Specifically, the latin-N.el files aren't consistent for
   common characters (and obviously have redundancies except in
   unibyte mode).

 * Fontset handling and customization needs work.  We want to relate
   fonts to scripts, probably based on the Unicode blocks.  The
   presence of small-repertoire 10646-encoded fonts in XFree 4 is a
   pain, not currently worked round.

 * Work is also needed on charset and coding system priorities.

 * The relevant bits of latin1-disp.el need porting (and probably
   re-naming/updating).  See also cyril-util.el.

 * Quail files need more work now the encoding is irrelevant.

 * What to do with the old coding categories stuff?

 * Syntax for symbols &c in characters.el needs looking at.

 * The preferred-coding-system property of charsets should probably be
   junked unless it can be made more useful now.

 * find-coding-systems-for-charsets needs re-writing or removing.

 * find-multibyte-characters needs looking at.

 * Implement Korean cp949/UHC and any other important missing
   charsets.

 * Check up on definitions of tcvn and alternativnj.

 * Lazy-load tables for unify-charset somehow?

 * Translation tables for {en,de}code currently aren't supported.

 * Defining CCL coding systems currently doesn't work.

 * iso-2022 charsets get unified on i/o.

 * Revisit locale processing: look at treating the language and
   charset parts separately.  (Language should affect things like
   speling and calendar, but that's not a Unicode issue.)

 * Handle Unicode combining characters usefully, e.g. diacritics, and
Commit	Line	Data
af301c44 DL	1	--text--
	2
	3	Problems, fixmes and other issues in the emacs-unicode branch
8cfdb48d	4	-------------------------------------------------------------
af301c44	5
63d6cc62 DL	6	Notes by fx to record various things of variable importance. handa
	7	needs to check them -- don't take too seriously, especially with
	8	regard to completeness.
af301c44	9
8cfdb48d DL	10	_Do take seriously that you don't want this branch unless you're
	11	actually working on it; you risk your data by actually using it._ If
	12	you just want to edit Unicode and/or unify iso-8859 et al, see the
	13	existing support and the extra stuff at
	14	<URL:ftp://dlpx1.dl.ac.uk/fx/emacs/Mule>, mostly now in the CVS trunk.
	15	(Editing support is mostly orthogonal to the internal representation.)
af301c44	16
8cfdb48d DL	17	* SINGLE_BYTE_CHAR_P returns true for Latin-1 characters, which has
8cfdb48d DL	18	undesirable effects.
af301c44 DL	19
	20	* Rationalize character syntax and its relationship to the Unicode
	21	database. Specifically, the latin-N.el files aren't consistent for
8cfdb48d DL	22	common characters (and obviously have redundancies except in
8cfdb48d DL	23	unibyte mode).
af301c44	24
8cfdb48d DL	25	* Fontset handling and customization needs work. We want to relate
	26	fonts to scripts, probably based on the Unicode blocks. The
	27	presence of small-repertoire 10646-encoded fonts in XFree 4 is a
	28	pain, not currently worked round.
af301c44	29
8cfdb48d	30	* Work is also needed on charset and coding system priorities.
af301c44 DL	31
	32	* The relevant bits of latin1-disp.el need porting (and probably
	33	re-naming/updating). See also cyril-util.el.
	34
8cfdb48d	35	* Quail files need more work now the encoding is irrelevant.
af301c44 DL	36
	37	* What to do with the old coding categories stuff?
	38
8cfdb48d	39	* Syntax for symbols &c in characters.el needs looking at.
af301c44 DL	40
	41	* The preferred-coding-system property of charsets should probably be
	42	junked unless it can be made more useful now.
	43
8cfdb48d	44	* find-coding-systems-for-charsets needs re-writing or removing.
af301c44 DL	45
	46	* find-multibyte-characters needs looking at.
	47
	48	* Implement Korean cp949/UHC and any other important missing
	49	charsets.
	50
8cfdb48d	51	* Check up on definitions of tcvn and alternativnj.
af301c44 DL	52
	53	* Lazy-load tables for unify-charset somehow?
	54
63d6cc62	55	* Translation tables for {en,de}code currently aren't supported.
af301c44 DL	56
	57	* Defining CCL coding systems currently doesn't work.
	58
	59	* iso-2022 charsets get unified on i/o.
	60
	61	* Revisit locale processing: look at treating the language and
	62	charset parts separately. (Language should affect things like
	63	speling and calendar, but that's not a Unicode issue.)
	64
	65	* Handle Unicode combining characters usefully, e.g. diacritics, and
8cfdb48d	66