Struct PixelValue 

#[repr(C)]
pub struct PixelValue {
    pub metric: SizeMetric,
    pub number: FloatValue,
}

Fields

metric: SizeMetric

number: FloatValue

Implementations

impl PixelValue

pub fn scale_for_dpi(&mut self, scale_factor: f32)

impl PixelValue

pub const fn zero() -> Self

pub const fn const_px(value: isize) -> Self

Same as PixelValue::px(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_em(value: isize) -> Self

Same as PixelValue::em(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_em_fractional(pre_comma: isize, post_comma: isize) -> Self

Creates an em value from a fractional number in const context.

Arguments

• pre_comma - The integer part (e.g., 1 for 1.5em)
• post_comma - The fractional part as digits (e.g., 5 for 0.5em, 83 for 0.83em)

Examples

// 1.5em = const_em_fractional(1, 5)
// 0.83em = const_em_fractional(0, 83)
// 1.17em = const_em_fractional(1, 17)

pub const fn const_pt(value: isize) -> Self

Same as PixelValue::pt(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_pt_fractional(pre_comma: isize, post_comma: isize) -> Self

Creates a pt value from a fractional number in const context.

pub const fn const_percent(value: isize) -> Self

Same as PixelValue::pt(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_in(value: isize) -> Self

Same as PixelValue::in(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_cm(value: isize) -> Self

Same as PixelValue::in(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_mm(value: isize) -> Self

Same as PixelValue::in(), but only accepts whole numbers, since using f32 in const fn is not yet stabilized.

pub const fn const_from_metric(metric: SizeMetric, value: isize) -> Self

pub const fn const_from_metric_fractional( metric: SizeMetric, pre_comma: isize, post_comma: isize, ) -> Self

Creates a PixelValue from a fractional number in const context.

Arguments

• metric - The size metric (Px, Em, Pt, etc.)
• pre_comma - The integer part
• post_comma - The fractional part as digits

pub fn px(value: f32) -> Self

pub fn em(value: f32) -> Self

pub fn inch(value: f32) -> Self

pub fn cm(value: f32) -> Self

pub fn mm(value: f32) -> Self

pub fn pt(value: f32) -> Self

pub fn percent(value: f32) -> Self

pub fn rem(value: f32) -> Self

pub fn from_metric(metric: SizeMetric, value: f32) -> Self

pub fn interpolate(&self, other: &Self, t: f32) -> Self

pub fn to_percent(&self) -> Option<NormalizedPercentage>

Returns the value of the SizeMetric as a normalized percentage (0.0 = 0%, 1.0 = 100%)

Returns Some(NormalizedPercentage) if this is a percentage value, None otherwise. The returned NormalizedPercentage is already normalized to 0.0-1.0 range, so you should multiply it directly with the containing block size.

pub fn resolve_with_context( &self, context: &ResolutionContext, property_context: PropertyContext, ) -> f32

Resolve this value to pixels using proper CSS context.

This is the CORRECT way to resolve CSS units. It properly handles:

• em units: Uses element’s own font-size (or parent’s for font-size property)
• rem units: Uses root element’s font-size
• % units: Uses property-appropriate reference (containing block width/height, element size, etc.)
• Absolute units: px, pt, in, cm, mm (already correct)

Arguments

• context - Resolution context with font sizes and dimensions
• property_context - Which property we’re resolving for (affects % and em resolution)

Trait Implementations

impl Clone for PixelValue

fn clone(&self) -> PixelValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PixelValue

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

Formats the value using the given formatter.

impl Default for PixelValue

fn default() -> PixelValue

Returns the “default value” for a type.

impl Display for PixelValue

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

Formats the value using the given formatter.

impl FormatAsCssValue for PixelValue

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

impl FormatAsRustCode for PixelValue

fn format_as_rust_code(&self, _tabs: usize) -> String

impl From<PixelValue> for PixelValueNoPercent

fn from(e: PixelValue) -> Self

Converts to this type from the input type.

impl Hash for PixelValue

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PixelValue

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

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PixelValue

fn eq(&self, other: &PixelValue) -> 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 PartialOrd for PixelValue

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

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PrintAsCssValue for PixelValue

fn print_as_css_value(&self) -> String

impl Copy for PixelValue

impl Eq for PixelValue

impl StructuralPartialEq for PixelValue