Struct GlueSpec 

pub struct GlueSpec {
    pub natural_subcell: u32,
    pub stretch_subcell: u32,
    pub shrink_subcell: u32,
}

TeX-style glue specification: natural width + stretch + shrink.

All values are in 1/256ths of a cell column (sub-cell units) to allow fine-grained control while remaining integer-only.

The optimizer computes an adjustment ratio r:

• r > 0: stretch by r × stretch_subcell
• r < 0: shrink by |r| × shrink_subcell
• r = 0: use natural width

Fields

natural_subcell: u32

Natural (ideal) width in sub-cell units (1/256 cell column).

stretch_subcell: u32

Maximum stretchability in sub-cell units.

shrink_subcell: u32

Maximum shrinkability in sub-cell units.

Implementations

impl GlueSpec

pub const WORD_SPACE: Self

A standard inter-word space: 1 cell, stretchable by 50%, shrinkable by 33%.

pub const SENTENCE_SPACE: Self

Inter-sentence space: 1.5 cells, more stretchable.

pub const FRENCH_SPACE: Self = Self::WORD_SPACE

French spacing: same as word space (no extra after sentences).

pub const INTER_CHAR: Self

Zero-width glue (for inter-character micro-adjustments).

pub const fn rigid(width_subcell: u32) -> Self

Rigid glue: no stretch, no shrink.

pub fn adjusted_width(&self, ratio_fixed: i32) -> u32

Compute the effective width at a given adjustment ratio.

ratio is in 1/256ths: positive = stretch, negative = shrink. Returns the adjusted width in sub-cell units, clamped to [natural - shrink, natural + stretch].

pub const fn elasticity(&self) -> u32

Total elasticity (stretch + shrink) in sub-cell units.

pub const fn is_rigid(&self) -> bool

Whether this glue is fully rigid (no stretch or shrink).

Trait Implementations

impl Clone for GlueSpec

fn clone(&self) -> GlueSpec

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for GlueSpec

impl Debug for GlueSpec

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

Formats the value using the given formatter.

impl Default for GlueSpec

fn default() -> Self

Returns the “default value” for a type.

impl Display for GlueSpec

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

Formats the value using the given formatter.

impl Eq for GlueSpec

impl Hash for GlueSpec

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 PartialEq for GlueSpec

fn eq(&self, other: &GlueSpec) -> 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 StructuralPartialEq for GlueSpec