Enum style::values::specified::font::FontSize

pub enum FontSize {
    Length(LengthPercentage),
    Keyword(KeywordInfo),
    Smaller,
    Larger,
    System(SystemFont),
}

A specified font-size value

Variants

Length(LengthPercentage)

A length; e.g. 10px.

Keyword(KeywordInfo)

A keyword value, along with a ratio and absolute offset. The ratio in any specified keyword value will be 1 (with offset 0), but we cascade keywordness even after font-relative (percent and em) values have been applied, which is where the ratio comes in. The offset comes in if we cascaded a calc value, where the font-relative portion (em and percentage) will go into the ratio, and the remaining units all computed together will go into the offset. See bug 1355707.

Smaller

font-size: smaller

Larger

font-size: larger

System(SystemFont)

Derived from a specified system font.

Implementations

impl FontSize

pub fn from_html_size(size: u8) -> Self

https://html.spec.whatwg.org/multipage/#rules-for-parsing-a-legacy-font-size

pub fn to_computed_value_against( &self, context: &Context<'_>, base_size: FontBaseSize, line_height_base: LineHeightBase, ) -> FontSize

Compute it against a given base font size

impl FontSize

pub fn system_font(f: SystemFont) -> Self

Get a specified value that represents a system font.

pub fn get_system(&self) -> Option<SystemFont>

Retreive a SystemFont from the specified value.

pub fn medium() -> Self

Get initial value for specified font size.

pub fn parse_quirky<'i, 't>( context: &ParserContext<'_>, input: &mut Parser<'i, 't>, allow_quirks: AllowQuirks, ) -> Result<FontSize, ParseError<'i>>

Parses a font-size, with quirks.

Trait Implementations

impl Clone for FontSize

fn clone(&self) -> FontSize

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for FontSize

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

Formats the value using the given formatter.

impl MallocSizeOf for FontSize

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 FontSize

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

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impl PartialEq for FontSize

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl SpecifiedValueInfo for FontSize

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 ToComputedValue for FontSize

type ComputedValue = FontSize

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

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

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

fn from_computed_value(computed: &FontSize) -> Self

Convert a computed value to specified value form.

impl ToCss for FontSize

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 ToShmem for FontSize

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

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

impl StructuralPartialEq for FontSize