README.unicode

   1                                                                    -*-text-*-
   2
   3 Problems, fixmes and other issues in the emacs-unicode branch
   4 -------------------------------------------------------------
   5
   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.
   9
  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.)
  16
  17  * SINGLE_BYTE_CHAR_P returns true for Latin-1 characters, which has
  18    undesirable effects.
  19
  20  * Rationalize character syntax and its relationship to the Unicode
  21    database.  Specifically, the latin-N.el files aren't consistent for
  22    common characters (and obviously have redundancies except in
  23    unibyte mode).
  24
  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.
  29
  30  * Work is also needed on charset and coding system priorities.
  31
  32  * The relevant bits of latin1-disp.el need porting (and probably
  33    re-naming/updating).  See also cyril-util.el.
  34
  35  * Quail files need more work now the encoding is irrelevant.
  36
  37  * What to do with the old coding categories stuff?
  38
  39  * Syntax for symbols &c in characters.el needs looking at.
  40
  41  * The preferred-coding-system property of charsets should probably be
  42    junked unless it can be made more useful now.
  43
  44  * find-coding-systems-for-charsets needs re-writing or removing.
  45
  46  * find-multibyte-characters needs looking at.
  47
  48  * Implement Korean cp949/UHC and any other important missing
  49    charsets.
  50
  51  * Check up on definitions of tcvn and alternativnj.
  52
  53  * Lazy-load tables for unify-charset somehow?
  54
  55  * Translation tables for {en,de}code currently aren't supported.
  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
  66    handle more scripts specifically (à la Devanagari).  There are
  67    issues with canonicalization.
  68
  69  * Bidi is a separate issue with no support currently.
  70
  71  * DTRT with X keysyms.  We should get the right unicode for a given
  72    keysym, not decode raw bytes in some ill-defined coding system.
  73    (fx has some data on keysyms v. unicodes.)
  74
  75  * We need tabular input methods, e.g. for maths symbols.  (Not
  76    specific to Unicode.)
  77
  78  * Need multibyte text in menus, e.g. for the above.  (Not specific to
  79    Unicode.)
  80
  81  * Still can't have case pairs which have different byte lengths --
  82    can that be fixed for Turkish, at least?
  83
  84  * There's currently no support for Unicode normalization.
  85
  86  * Populate char-width-table correctly for Unicode chanaracters and
  87    worry about what happens when double-width charsets covering
  88    non-CJK characters are unified.
  89
  90  * Emacs 20/21 .elc files are currently not loadable.  It may or may
  91    not be possible to do this properly.
  92
  93  * Encoding issues in babyl files/rmail need sorting out.
  94
  95  * Gnus still needs some attention, and we need to get changes
  96    accepted by Gnus maintainers...
  97
  98  * You can grep the code for lots of fixmes.