Enum style::values::generics::url::GenericUrlOrNone

#[repr(C, u8)]
pub enum GenericUrlOrNone<U> {
    None,
    Url(U),
}

An image url or none, used for example in list-style-image

Variants

None

none

Url(U)

A URL.

Implementations

impl<Url> UrlOrNone<Url>

pub fn none() -> Self

Initial “none” value for properties such as list-style-image

pub fn is_none(&self) -> bool

Returns whether the value is none.

Trait Implementations

impl<U> Animate for GenericUrlOrNone<U>

where U: Animate,

fn animate(&self, other: &Self, procedure: Procedure) -> Result<Self, ()>

Animate a value towards another one, given an animation procedure.

impl<U: Clone> Clone for GenericUrlOrNone<U>

fn clone(&self) -> GenericUrlOrNone<U>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<U> ComputeSquaredDistance for GenericUrlOrNone<U>

where U: ComputeSquaredDistance,

fn compute_squared_distance(&self, other: &Self) -> Result<SquaredDistance, ()>

Computes the squared distance between two animatable values.

impl<U: Debug> Debug for GenericUrlOrNone<U>

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

Formats the value using the given formatter.

impl<U> MallocSizeOf for GenericUrlOrNone<U>

where U: MallocSizeOf,

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl<U> Parse for GenericUrlOrNone<U>

where U: Parse,

fn parse<'i, 't>( context: &ParserContext<'_>, input: &mut Parser<'i, 't>, ) -> Result<Self, ParseError<'i>>

Parse a value of this type.

impl<U: PartialEq> PartialEq for GenericUrlOrNone<U>

fn eq(&self, other: &GenericUrlOrNone<U>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

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

impl<U> SpecifiedValueInfo for GenericUrlOrNone<U>

where U: SpecifiedValueInfo,

const SUPPORTED_TYPES: u8 = _

Supported CssTypes by the given value type.

fn collect_completion_keywords(_f: &mut dyn FnMut(&[&'static str]))

Collect value starting words for the given specified value type. This includes keyword and function names which can appear at the beginning of a value of this type.

impl<U> ToAnimatedValue for GenericUrlOrNone<U>

where U: ToAnimatedValue,

type AnimatedValue = GenericUrlOrNone<<U as ToAnimatedValue>::AnimatedValue>

The type of the animated value.

fn from_animated_value(from: Self::AnimatedValue) -> Self

Converts back an animated value into a computed value.

fn to_animated_value(self, context: &Context<'_>) -> Self::AnimatedValue

Converts this value to an animated value.

impl<U> ToAnimatedZero for GenericUrlOrNone<U>

where U: ToAnimatedZero,

fn to_animated_zero(&self) -> Result<Self, ()>

Returns a value that, when added with an underlying value, will produce the underlying value. This is used for SMIL animation’s “by-animation” where SMIL first interpolates from the zero value to the ‘by’ value, and then adds the result to the underlying value.

impl<U> ToComputedValue for GenericUrlOrNone<U>

where U: ToComputedValue,

type ComputedValue = GenericUrlOrNone<<U as ToComputedValue>::ComputedValue>

The computed value type we’re going to be converted to.

fn from_computed_value(from: &Self::ComputedValue) -> Self

Convert a computed value to specified value form.

fn to_computed_value(&self, context: &Context<'_>) -> Self::ComputedValue

Convert a specified value to a computed value, using itself and the data inside the Context.

impl<U> ToCss for GenericUrlOrNone<U>

where U: ToCss,

fn to_css<W>(&self, dest: &mut CssWriter<'_, W>) -> Result

where W: Write,

Serialize self in CSS syntax, writing to dest.

fn to_css_string(&self) -> String

Serialize self in CSS syntax and return a string.

impl<U> ToResolvedValue for GenericUrlOrNone<U>

where U: ToResolvedValue,

type ResolvedValue = GenericUrlOrNone<<U as ToResolvedValue>::ResolvedValue>

The resolved value type we’re going to be converted to.

fn from_resolved_value(from: Self::ResolvedValue) -> Self

Convert a resolved value to resolved value form.

fn to_resolved_value(self, context: &Context<'_>) -> Self::ResolvedValue

Convert a resolved value to a resolved value.

impl<U> ToShmem for GenericUrlOrNone<U>

where U: ToShmem,

fn to_shmem(&self, builder: &mut SharedMemoryBuilder) -> Result<Self>

Clones this value into a form suitable for writing into a SharedMemoryBuilder.

impl<U> StructuralPartialEq for GenericUrlOrNone<U>