Enum zng_layout::context::TextSegmentKind

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pub enum TextSegmentKind {
Show 17 variants LeftToRight, RightToLeft, ArabicLetter, EuropeanNumber, EuropeanSeparator, EuropeanTerminator, ArabicNumber, CommonSeparator, NonSpacingMark, BoundaryNeutral, Emoji, LineBreak, Tab, Space, OtherNeutral, Bracket(char), BidiCtrl(char),
}
Expand description

The type of an inline/text segment.

Variants§

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LeftToRight

Any strong left-to-right character.

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RightToLeft

Any strong right-to-left (non-Arabic-type) character.

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ArabicLetter

Any strong right-to-left (Arabic-type) character.

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EuropeanNumber

Any ASCII digit or Eastern Arabic-Indic digit.

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EuropeanSeparator

Plus and minus signs.

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EuropeanTerminator

A terminator in a numeric format context, includes currency signs.

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ArabicNumber

Any Arabic-Indic digit.

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CommonSeparator

Commas, colons, and slashes.

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NonSpacingMark

Any non-spacing mark.

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BoundaryNeutral

Most format characters, control codes, or non-characters.

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Emoji

Emoji chars, components and zero-width-joiner between emoji.

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LineBreak

Various newline characters.

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Tab

A sequence of '\t', '\v' or '\u{1F}'.

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Space

Spaces.

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OtherNeutral

Most other symbols and punctuation marks.

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Bracket(char)

Open or close bidi bracket.

Can be any chars in https://unicode.org/Public/UNIDATA/BidiBrackets.txt.

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BidiCtrl(char)

Bidi control character.

Chars can be:

  • \u{202A}: The LR embedding control.

  • \u{202D}: The LR override control.

  • \u{202B}: The RL embedding control.

  • \u{202E}: The RL override control.

  • \u{202C}: Terminates an embedding or override control.

  • \u{2066}: The LR isolate control.

  • \u{2067}: The RL isolate control.

  • \u{2068}: The first strong isolate control.

  • \u{2069}: Terminates an isolate control.

Implementations§

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impl TextSegmentKind

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pub fn is_word(self) -> bool

Returns true if the segment can be considered part of a word for the purpose of inserting letter spacing.

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pub fn is_space(self) -> bool

Returns true if the segment can be considered part of space between words for the purpose of inserting word spacing.

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pub fn is_line_break(self) -> bool

Returns true if the segment terminates the current line.

Line break segments are the last segment of their line and explicitly start a new line.

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pub fn can_merge(self) -> bool

If multiple segments of this same kind can be represented by a single segment in the Unicode bidi algorithm.

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pub fn bracket_info(self) -> Option<BidiMatchedOpeningBracket>

Get more info about the bracket char if self is Bracket(_) with a valid char.

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pub fn strong_direction(self) -> Option<LayoutDirection>

Gets the layout direction this segment will always be in, independent of the base direction.

Returns None if the segment direction depends on the line context.

Trait Implementations§

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impl Clone for TextSegmentKind

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fn clone(&self) -> TextSegmentKind

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TextSegmentKind

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for TextSegmentKind

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl From<BidiClass> for TextSegmentKind

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fn from(value: BidiClass) -> Self

Converts to this type from the input type.
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impl From<TextSegmentKind> for BidiClass

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fn from(value: TextSegmentKind) -> Self

Converts to this type from the input type.
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impl From<char> for TextSegmentKind

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fn from(c: char) -> Self

Converts to this type from the input type.
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impl Hash for TextSegmentKind

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for TextSegmentKind

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fn eq(&self, other: &TextSegmentKind) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for TextSegmentKind

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for TextSegmentKind

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impl Eq for TextSegmentKind

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impl StructuralPartialEq for TextSegmentKind

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impl<T> Any for T
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Gets the TypeId of self. Read more
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Access to dyn Any methods.
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Access to mut dyn Any methods.
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Clone the value.
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Clone the value into a new boxed LocalVar<Self>.
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🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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Returns the argument unchanged.

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Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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