#[repr(u32)]
pub enum GenericFontFamily { Serif = 1, SansSerif = 2, Monospace = 3, Cursive = 4, Fantasy = 5, SystemUi = 6, Emoji = 7, Math = 8, Fangsong = 9, }
Expand description

Generic groups of font families that can serve as fallbacks for a specific family.

Every font family belongs to some generic font family (see examples below).

If an exact requested family is unavailable but a fallback group is specified in the request, the provider may return some other family that belongs to the fallback group. For example, if the client requests the “Arial” family with a SANS_SERIF fallback, and “Arial” is unavailable, the provider may return another available sans serif family, such as “Roboto Regular”, instead.

See also: https://www.w3.org/TR/css-fonts-4/#generic-font-families

Variants§

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Serif = 1

Glyphs have little “serifs”, hooks, or notches at the ends of most strokes. Examples: Georgia, Noto Serif, Times New Roman.

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SansSerif = 2

Glyphs that have no serifs at the ends of most strokes. Examples: Arial, Noto Sans, Roboto, Tahoma.

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Monospace = 3

Fixed-width fonts. Examples: Consolas, Courier New, Inconsolata.

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Cursive = 4

Handwritten or cursive fonts. Examples: Brush Script, Comic Sans, Lucida Calligraphy.

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Fantasy = 5

Decorative fonts. Examples: Impact, Papyrus.

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SystemUi = 6

The default user interface font on the target platform. This is included for completeness with the CSS specification; font manifests should not declare that a font belongs to the SYSTEM_UI generic family, but instead should declare a more specific option (e.g. SERIF for Roboto).

Not commonly used.

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Emoji = 7

Fonts that are used specifically for rendering emoji code points. Examples: Noto Color Emoji.

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Math = 8

Fonts that are used primarily for rendering mathematical expressions.

Not commonly used.

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Fangsong = 9

A group of Chinese fonts between serif and cursive, often used for official Chinese Government documents.

Not commonly used.

Implementations§

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impl GenericFontFamily

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pub fn from_primitive(prim: u32) -> Option<Self>

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pub const fn into_primitive(self) -> u32

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pub fn is_unknown(&self) -> bool

👎Deprecated: Strict enums should not use is_unknown

Trait Implementations§

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impl Clone for GenericFontFamily

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fn clone(&self) -> GenericFontFamily

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 GenericFontFamily

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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 Decode<GenericFontFamily> for GenericFontFamily

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fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.
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unsafe fn decode( &mut self, decoder: &mut Decoder<'_>, offset: usize, _depth: Depth ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self. Read more
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impl Encode<GenericFontFamily> for GenericFontFamily

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unsafe fn encode( self, encoder: &mut Encoder<'_>, offset: usize, _depth: Depth ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl Hash for GenericFontFamily

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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 Ord for GenericFontFamily

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fn cmp(&self, other: &GenericFontFamily) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for GenericFontFamily

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for GenericFontFamily

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fn partial_cmp(&self, other: &GenericFontFamily) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl TypeMarker for GenericFontFamily

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type Owned = GenericFontFamily

The owned Rust type which this FIDL type decodes into.
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fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.
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fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.
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fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy. Read more
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fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.
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impl ValueTypeMarker for GenericFontFamily

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type Borrowed<'a> = GenericFontFamily

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &Self::Owned. There are three cases: Read more
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fn borrow<'a>(value: &'a <Self as TypeMarker>::Owned) -> Self::Borrowed<'a>

Cheaply converts from &Self::Owned to Self::Borrowed.
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impl Copy for GenericFontFamily

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impl Eq for GenericFontFamily

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impl StructuralPartialEq for GenericFontFamily

Auto Trait Implementations§

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<T> Encode<Ambiguous1> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<T> Encode<Ambiguous2> for T

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unsafe fn encode( self, _encoder: &mut Encoder<'_>, _offset: usize, _depth: Depth ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more
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impl<E> ErrorType for E
where E: ValueTypeMarker<Owned = E> + Decode<E>,

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type Marker = E

The marker type.
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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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more