Enum MetricsOverride 

pub enum MetricsOverride {
    Override(NonNegativePercentage),
    Normal,
}

A metrics override value for a @font-face descriptor

https://drafts.csswg.org/css-fonts/#font-metrics-override-desc

Variants

Override(NonNegativePercentage)

A non-negative <percentage> of the computed font size

Normal

Normal metrics from the font.

Implementations

impl MetricsOverride

pub fn normal() -> MetricsOverride

Get default value with normal

pub fn compute(&self) -> ComputedPercentage

The ToComputedValue implementation, used for @font-face descriptors.

Valid override percentages must be non-negative; we return -1.0 to indicate the absence of an override (i.e. ‘normal’).

Trait Implementations

impl Clone for MetricsOverride

fn clone(&self) -> MetricsOverride

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricsOverride

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

Formats the value using the given formatter.

impl MallocSizeOf for MetricsOverride

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 Parse for MetricsOverride

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

Parse a value of this type.

impl PartialEq for MetricsOverride

fn eq(&self, other: &MetricsOverride) -> 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 SpecifiedValueInfo for MetricsOverride

const SUPPORTED_TYPES: u8 = 0u8

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 ToCss for MetricsOverride

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.

fn to_css_cssstring(&self) -> String

Serialize self in CSS syntax and return a CssString.

impl ToShmem for MetricsOverride

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

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

impl Copy for MetricsOverride

impl StructuralPartialEq for MetricsOverride