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Diffstat (limited to 'doc/unictype.texi')
| -rw-r--r-- | doc/unictype.texi | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/doc/unictype.texi b/doc/unictype.texi index ac20f778..e24cba9d 100644 --- a/doc/unictype.texi +++ b/doc/unictype.texi @@ -21,6 +21,7 @@ in the presence of specific Unicode characters. * Mirrored character:: * Arabic shaping:: * Properties:: +* Other attributes:: * Scripts:: * Blocks:: * ISO C and Java syntax:: @@ -715,6 +716,16 @@ The following function looks up the mirrored character of a Unicode character. Stores the mirrored character of a Unicode character @var{uc} in @code{*@var{puc}} and returns @code{true}, if it exists. Otherwise it stores @var{uc} unmodified in @code{*@var{puc}} and returns @code{false}. + +Note: It is possible for this function to return @code{true} and set +@code{*@var{puc}} to @code{0xFFFD}. +This happens when the character has the bidi mirror property (that is, it +should be displayed through a mirrored glyph) but this mirrored glyph +does not exist as a Unicode character; thus a rendering engine needs to +synthesize it artificially or pick it from an appropriate font. +@c The list of such characters is found at the end of BidiMirroring.txt. +This affects mostly mathematical operators. +See section ``Bidi Mirrored'' of the Unicode standard. @end deftypefun @node Arabic shaping @@ -1003,6 +1014,8 @@ The following properties are related to identifiers. @deftypevrx Constant uc_property_t UC_PROPERTY_OTHER_ID_CONTINUE @deftypevrx Constant uc_property_t UC_PROPERTY_XID_START @deftypevrx Constant uc_property_t UC_PROPERTY_XID_CONTINUE +@deftypevrx Constant uc_property_t UC_PROPERTY_ID_COMPAT_MATH_START +@deftypevrx Constant uc_property_t UC_PROPERTY_ID_COMPAT_MATH_CONTINUE @deftypevrx Constant uc_property_t UC_PROPERTY_PATTERN_WHITE_SPACE @deftypevrx Constant uc_property_t UC_PROPERTY_PATTERN_SYNTAX @end deftypevr @@ -1048,6 +1061,7 @@ The following properties deal with CJK. @deftypevr Constant uc_property_t UC_PROPERTY_IDEOGRAPHIC @deftypevrx Constant uc_property_t UC_PROPERTY_UNIFIED_IDEOGRAPH @deftypevrx Constant uc_property_t UC_PROPERTY_RADICAL +@deftypevrx Constant uc_property_t UC_PROPERTY_IDS_UNARY_OPERATOR @deftypevrx Constant uc_property_t UC_PROPERTY_IDS_BINARY_OPERATOR @deftypevrx Constant uc_property_t UC_PROPERTY_IDS_TRINARY_OPERATOR @end deftypevr @@ -1069,6 +1083,7 @@ Other miscellaneous properties are: @deftypevrx Constant uc_property_t UC_PROPERTY_NON_BREAK @deftypevrx Constant uc_property_t UC_PROPERTY_ISO_CONTROL @deftypevrx Constant uc_property_t UC_PROPERTY_FORMAT_CONTROL +@deftypevrx Constant uc_property_t UC_PROPERTY_PREPENDED_CONCATENATION_MARK @deftypevrx Constant uc_property_t UC_PROPERTY_DASH @deftypevrx Constant uc_property_t UC_PROPERTY_HYPHEN @deftypevrx Constant uc_property_t UC_PROPERTY_PUNCTUATION @@ -1163,6 +1178,8 @@ The following properties are related to identifiers. @deftypefunx bool uc_is_property_other_id_continue (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_xid_start (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_xid_continue (ucs4_t@tie{}@var{uc}) +@deftypefunx bool uc_is_property_id_compat_math_start (ucs4_t@tie{}@var{uc}) +@deftypefunx bool uc_is_property_id_compat_math_continue (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_pattern_white_space (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_pattern_syntax (ucs4_t@tie{}@var{uc}) @end deftypefun @@ -1208,6 +1225,7 @@ The following properties deal with CJK. @deftypefun bool uc_is_property_ideographic (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_unified_ideograph (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_radical (ucs4_t@tie{}@var{uc}) +@deftypefunx bool uc_is_property_ids_unary_operator (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_ids_binary_operator (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_ids_trinary_operator (ucs4_t@tie{}@var{uc}) @end deftypefun @@ -1229,6 +1247,7 @@ Other miscellaneous properties are: @deftypefunx bool uc_is_property_non_break (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_iso_control (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_format_control (ucs4_t@tie{}@var{uc}) +@deftypefunx bool uc_is_property_prepended_concatenation_mark (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_dash (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_hyphen (ucs4_t@tie{}@var{uc}) @deftypefunx bool uc_is_property_punctuation (ucs4_t@tie{}@var{uc}) @@ -1252,6 +1271,50 @@ Other miscellaneous properties are: @deftypefunx bool uc_is_property_regional_indicator (ucs4_t@tie{}@var{uc}) @end deftypefun +@node Other attributes +@section Other attributes + +This section defines non-boolean attributes of Unicode characters. + +@menu +* Indic conjunct break:: +@end menu + +@node Indic conjunct break +@subsection Indic conjunct break + +@cindex Indic_Conjunct_Break +The Indic_Conjunct_Break attribute is used when determining the grapheme +cluster boundary in Indic scripts. + +The Indic_Conjunct_Break attribute has the following possible values: + +@deftypevr Constant int UC_INDIC_CONJUNCT_BREAK_NONE +@deftypevrx Constant int UC_INDIC_CONJUNCT_BREAK_CONSONANT +@deftypevrx Constant int UC_INDIC_CONJUNCT_BREAK_LINKER +@deftypevrx Constant int UC_INDIC_CONJUNCT_BREAK_EXTEND +@end deftypevr + +The following functions implement the association between an +Indic_Conjunct_Break value and its name. + +@deftypefun {const char *} uc_indic_conjunct_break_name (int@tie{}@var{indic_conjunct_break}) +Returns the name of an Indic_Conjunct_Break value. +@end deftypefun + +@deftypefun int uc_indic_conjunct_break_byname (const@tie{}char@tie{}*@var{indic_conjunct_break_name}) +Returns the Indic_Conjunct_Break value given by name, e.g@. @code{"Consonant"}. +This lookup ignores spaces, underscores, or hyphens as word separators and is +case-insignificant. +@end deftypefun + +The following function gives the Indic_Conjunct_Break attribute of every +Unicode character. + +@deftypefun int uc_indic_conjunct_break (ucs4_t@tie{}@var{uc}) +Returns the Indic_Conjunct_Break attribute of a Unicode character. +@end deftypefun + @node Scripts @section Scripts |