Enum EastAsianWidthClass

Namespace

SixLabors.Fonts.Unicode

Assembly

SixLabors.Fonts.dll

Unicode East_Asian_Width property values. https://www.unicode.org/reports/tr11/

public enum EastAsianWidthClass

Fields

Ambiguous = 1

Ambiguous (A): characters that can be either wide or narrow depending on context.

Ambiguous characters need extra information, such as language, script, font, source encoding, or explicit markup, before they can be resolved to a display width. In East Asian legacy contexts they may be treated as wide; otherwise UAX #11 recommends treating them as narrow by default.

Fullwidth = 2

Fullwidth (F): explicitly encoded fullwidth compatibility characters.

Fullwidth characters have a compatibility decomposition of type <wide> to another Unicode character that is implicitly narrow. They exist to preserve round-tripping with mixed-width East Asian legacy encodings.

Halfwidth = 3

Halfwidth (H): explicitly encoded halfwidth compatibility characters.

Halfwidth characters have a compatibility decomposition of type <narrow> to another Unicode character that is implicitly wide, with the special case of U+20A9 WON SIGN. They are distinct from ordinary narrow characters because they can still behave like East Asian compatibility forms for font selection and some punctuation behavior.

Narrow = 4

Narrow (Na): characters that are always narrow and have explicit wide or fullwidth counterparts.

Narrow characters are implicitly narrow in East Asian typography and legacy character sets. ASCII is the common example: the ordinary ASCII code points are Narrow, while their compatibility forms are Fullwidth.

Neutral = 0

Neutral (N): characters that are not East Asian for this property.

Neutral characters are not normally found in legacy East Asian character sets or traditional East Asian typography. UAX #11 recommends treating them like narrow characters for practical resolved-width decisions, but the property value itself is distinct from Narrow.

Wide = 5

Wide (W): characters that are always wide in East Asian typography.

Wide characters behave like ideographs for East Asian layout. This includes many Han, Kana, Hangul, and emoji-presentation characters that are not encoded as explicit Fullwidth compatibility forms.

Remarks

East_Asian_Width is a Unicode character property used when interoperating with East Asian legacy encodings and typography. The property has six default values, but any operation that needs a display-cell width must still resolve those values to a context-specific narrow or wide result.