Struct Percentage 

pub struct Percentage(NumericUnion<(), f32, CalcNumeric>);

A specified percentage value, either a plain value or a calc() expression.

Tuple Fields

0: NumericUnion<(), f32, CalcNumeric>

Implementations

impl Percentage

pub fn new(value: CSSFloat) -> Self

Creates a percentage from a numeric value.

pub fn new_calc(val: Box<CalcNumeric>) -> Self

Returns a new percentage calc value with the value val.

pub fn zero() -> Self

0%

pub fn hundred() -> Self

100%

pub fn get(&self) -> Option<f32>

Returns the value if this is a plain (non-calc) percentage, or None otherwise. Use resolve() to also handle resolvable calc expressions, or to_computed_value() when computed context is available.

pub fn resolve(&self) -> Option<CSSFloat>

Returns the value if it can be resolved at parse time, including resolvable calc expressions. Returns None for calc expressions that require computed context (e.g. those using relative lengths or sibling-index()).

pub fn to_number(&self) -> Option<Number>

Returns this percentage as a number.

pub fn to_length_percentage(self) -> LengthPercentage

Returns this percentage as a LengthPercentage.

pub fn reverse(&mut self)

Reverses this percentage, preserving calc-ness.

For example: If it was 20%, convert it into 80%.

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

Parses a specific kind of percentage.

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

Parses a percentage token, but rejects it if it’s negative.

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

Parses a percentage token, but rejects it if it’s negative or more than 100%.

pub fn clamp_to_hundred(&mut self)

Clamp to 100% if the value is over 100%.

Trait Implementations

impl Clone for Percentage

fn clone(&self) -> Percentage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Percentage

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

Formats the value using the given formatter.

impl MallocSizeOf for Percentage

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 Percentage

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

Parse a value of this type.

impl PartialEq for Percentage

fn eq(&self, other: &Percentage) -> 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 Percentage

const SUPPORTED_TYPES: u8 = 0

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 Percentage

type ComputedValue = Percentage

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

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.

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

Convert a computed value to specified value form.

impl ToCss for Percentage

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 ToPercentage for Percentage

fn is_calc(&self) -> bool

Returns whether this percentage used to be a calc().

fn to_percentage(&self) -> Option<CSSFloat>

Returns the percentage as a plain float, or None for calc expressions that require computed context. Will always return Some if is_calc is false.

impl ToShmem for Percentage

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

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

impl ToTyped for Percentage

fn to_typed(&self, dest: &mut ThinVec<TypedValue>) -> Result<(), ()>

Attempt to convert self into one or more TypedValue items.

fn to_typed_value(&self) -> Option<TypedValue>

Attempt to convert self into a TypedValue.

fn to_numeric_value(&self) -> Option<NumericValue>

Attempt to convert self into a NumericValue.

fn to_typed_value_list(&self) -> Option<TypedValueList>

Attempt to convert self into a TypedValueList.

impl StructuralPartialEq for Percentage