Enum GraphemeClusterClass

Namespace

SixLabors.Fonts.Unicode

Assembly

SixLabors.Fonts.dll

Unicode Grapheme_Cluster_Break property values and local rule sentinels. https://www.unicode.org/reports/tr29/#Grapheme_Cluster_Break_Property_Values

public enum GraphemeClusterClass

Fields

Any = 0

Rule sentinel that matches any code point.

This is not a Unicode property value; it represents the "any" operand in UAX #29 boundary rules.

CarriageReturn = 1

U+000D CARRIAGE RETURN (CR).

Control = 3

Controls, separators, formats, and default-ignorable unassigned code points that form hard grapheme cluster boundaries.

This class excludes CR, LF, U+200C ZERO WIDTH NON-JOINER, U+200D ZERO WIDTH JOINER, and prepended concatenation marks because those participate in more specific UAX #29 rules.

Extend = 4

Extending code points that remain in the same extended grapheme cluster as the preceding base.

This includes Grapheme_Extend code points, emoji modifiers, U+200C ZERO WIDTH NON-JOINER, and a small number of spacing marks needed for canonical equivalence.

ExtendedPictographic = 13

Extended pictographic code points used by GB11 emoji ZWJ sequence handling.

This is not itself a Grapheme_Cluster_Break property value; UAX #29 uses it when matching emoji ZWJ sequences.

HangulLead = 8

Hangul leading consonant Jamo (Hangul_Syllable_Type = L).

HangulLeadVowel = 11

Hangul LV syllables.

HangulLeadVowelTail = 12

Hangul LVT syllables.

HangulTail = 10

Hangul trailing consonant Jamo (Hangul_Syllable_Type = T).

HangulVowel = 9

Hangul vowel Jamo (Hangul_Syllable_Type = V).

LineFeed = 2

U+000A LINE FEED (LF).

Other = 255

Other.

This is the Unicode Other / XX fallback for code points without an explicit grapheme cluster break class.

Prepend = 6

Code points that prepend to the following grapheme cluster.

This includes Indic_Syllabic_Category values Consonant_Preceding_Repha and Consonant_Prefixed, plus Prepended_Concatenation_Mark code points.

RegionalIndicator = 5

Regional indicator symbols used to build flag emoji pairs.

SpacingMark = 7

Spacing marks that extend the previous grapheme cluster.

This includes spacing marks whose Grapheme_Cluster_Break value is not Extend, plus U+0E33 THAI CHARACTER SARA AM and U+0EB3 LAO VOWEL SIGN AM.

ZeroWidthJoiner = 14

U+200D ZERO WIDTH JOINER.

Remarks

UAX #29 uses these classes in ordered boundary rules to determine extended grapheme clusters. Some members are rule sentinels rather than Unicode property values exposed by the standard.