Enum LayoutTier 

pub enum LayoutTier {
    Emergency = 0,
    Fast = 1,
    Balanced = 2,
    Quality = 3,
}

Named quality tiers for text layout.

Higher tiers produce better output but require more computation and richer runtime capabilities (proportional fonts, sub-pixel positioning).

Variants

Emergency = 0

Survival mode: bare-minimum rendering under extreme compute pressure. Greedy wrapping, no justification, no leading, no shaping. Only used when the adaptive controller forces degradation below Fast.

Fast = 1

Minimal: greedy wrapping, no justification, no leading. Suitable for raw terminal output where every cell counts.

Balanced = 2

Moderate: optimal line-breaking, French spacing, moderate leading. Good default for terminal UIs with readable text.

Quality = 3

Full: TeX-class typography with baseline grid, microtypographic justification, hyphenation, and fine-grained spacing.

Implementations

impl LayoutTier

pub const fn degrade(&self) -> Option<Self>

The tier one step below, or None if already at Emergency.

pub fn degradation_chain(&self) -> Vec<Self>

All tiers from this one down to Fast (inclusive), in degradation order.

Trait Implementations

impl Clone for LayoutTier

fn clone(&self) -> LayoutTier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LayoutTier

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

Formats the value using the given formatter.

impl Default for LayoutTier

fn default() -> LayoutTier

Returns the “default value” for a type.

impl Display for LayoutTier

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

Formats the value using the given formatter.

impl Hash for LayoutTier

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 LayoutTier

fn cmp(&self, other: &LayoutTier) -> 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 LayoutTier

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

fn partial_cmp(&self, other: &LayoutTier) -> 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 Copy for LayoutTier

impl Eq for LayoutTier

impl StructuralPartialEq for LayoutTier