Enum read_fonts::tables::gsub::SubstitutionLookup

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pub enum SubstitutionLookup<'a> {
    Single(Lookup<'a, SingleSubst<'a>>),
    Multiple(Lookup<'a, MultipleSubstFormat1<'a>>),
    Alternate(Lookup<'a, AlternateSubstFormat1<'a>>),
    Ligature(Lookup<'a, LigatureSubstFormat1<'a>>),
    Contextual(Lookup<'a, SubstitutionSequenceContext<'a>>),
    ChainContextual(Lookup<'a, SubstitutionChainContext<'a>>),
    Extension(Lookup<'a, ExtensionSubtable<'a>>),
    Reverse(Lookup<'a, ReverseChainSingleSubstFormat1<'a>>),
}
Expand description

A GSUB Lookup subtable.

Variants§

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Single(Lookup<'a, SingleSubst<'a>>)

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Multiple(Lookup<'a, MultipleSubstFormat1<'a>>)

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Alternate(Lookup<'a, AlternateSubstFormat1<'a>>)

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Ligature(Lookup<'a, LigatureSubstFormat1<'a>>)

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Contextual(Lookup<'a, SubstitutionSequenceContext<'a>>)

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ChainContextual(Lookup<'a, SubstitutionChainContext<'a>>)

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Extension(Lookup<'a, ExtensionSubtable<'a>>)

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Reverse(Lookup<'a, ReverseChainSingleSubstFormat1<'a>>)

Implementations§

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impl<'a> SubstitutionLookup<'a>

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pub fn lookup_flag(&self) -> LookupFlag

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pub fn lookup_type(&self) -> u16

Different enumerations for GSUB and GPOS

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pub fn mark_filtering_set(&self) -> u16

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pub fn subtables(&self) -> Result<SubstitutionSubtables<'a>, ReadError>

Return the subtables for this lookup.

This method handles both extension and non-extension lookups, and saves the caller needing to dig into the SubstitutionLookup enum itself.

Trait Implementations§

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impl<'a> Debug for SubstitutionLookup<'a>

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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<'a> FontRead<'a> for SubstitutionLookup<'a>

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fn read(bytes: FontData<'a>) -> Result<Self, ReadError>

Read an instace of Self from the provided data, performing validation. Read more
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impl<'a> SomeTable<'a> for SubstitutionLookup<'a>

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fn get_field(&self, idx: usize) -> Option<Field<'a>>

Access this table’s fields, in declaration order.
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fn type_name(&self) -> &str

The name of this table

Auto Trait Implementations§

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impl<'a> Freeze for SubstitutionLookup<'a>

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impl<'a> RefUnwindSafe for SubstitutionLookup<'a>

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impl<'a> !Send for SubstitutionLookup<'a>

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impl<'a> !Sync for SubstitutionLookup<'a>

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impl<'a> Unpin for SubstitutionLookup<'a>

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impl<'a> UnwindSafe for SubstitutionLookup<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<'a, T> FontReadWithArgs<'a> for T
where T: FontRead<'a>,

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fn read_with_args( data: FontData<'a>, _: &<T as ReadArgs>::Args ) -> Result<T, ReadError>

read an item, using the provided args. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<'a, T> ReadArgs for T
where T: FontRead<'a>,

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type Args = ()

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.